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#include"stdio.h"
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#include"windows.h"
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#include"conio.h"
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#include"stdlib.h"
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#include"string.h"
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int menu();
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int menu_select();
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void tj();
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void cx();
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int xg();
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void xs();
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void fd();
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void pm();
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float fm();
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int pass();
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int average();
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int wenjiandiaochu();
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int mima();
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int i,j,k,y;
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FILE *fp;
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struct stu
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{
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int xh;
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char name[30];
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float score;
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};struct stu s[100];
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int main()
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{
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system("color F4");//亮白，红
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system("pause");
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int e;
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e=mima();
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if(e==1)
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return 0;
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printf("\n");
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printf("\t*-*-*-*-*-*-*-*-*-*-*-*-*-*\n");
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printf("\t* 好嗨哟！ *\n");
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printf("\t* 恭喜你的人生到达了 *\n");
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printf("\t* 学生C语言成绩记录簿系统 *\n");
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printf("\t* *^_^* *\n");
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printf("\t* *^欢迎使用^* *\n");
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printf("\t*-*-*-*-*-*-*-*-*-*-*-*-*-*\n");
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printf("\n");
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menu();
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return 0;
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}
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int menu()//菜单
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{
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int n=0;
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char c,a;
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n=menu_select();
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switch(n)
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{
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case 0: tj(); break;//添加
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case 1: xg(); break;// 修改
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case 2: xs(); break;//显示
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case 3: cx();break;//查询
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case 4: pm();break;//排序
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case 5: fm();break;//最高和最低分
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case 6: average();break;//平均分
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case 7: pass();break;//及格率
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case 8: fd();break;//学生成绩分段
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case 9: return 0;//结束
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}
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if(0<=n&&n<=8)
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{
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printf("是否继续对学生成绩进行管理，是请输入Y，否请输入N\n");
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a=getchar();
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scanf("%c",&c);
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if(c=='y'||c=='Y')
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{
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system("cls");
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menu();
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}
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while(c!='y'&&c!='Y'&&c!='n'&&c!='N')
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{
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printf("你的输入怕是有毛病，现在请重新输入：\n");
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scanf("%c",&c);
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getchar();
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if(c=='y'||c=='Y')
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{
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system("cls");
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menu();
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}
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if(c=='n'||c=='N')
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{
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return 0;
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}
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}
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}
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}
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int menu_select()//菜单选择
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{int a;
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printf("\n");
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printf("\t*-*-*-*-*-*-*-*-*-*-*-*-*-*\n");
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printf("\t*-0. 添加学生信息 -*\n");
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printf("\t*-1. 修改学生信息 -*\n");
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printf("\t*-2. 显示学生信息 -*\n");
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printf("\t*-3. 查询学生信息 -*\n");
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printf("\t*-4. 学生信息排序 -*\n");
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printf("\t*-5. 最高和最低分 -*\n");
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printf("\t*-6. 平均分 -*\n");
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printf("\t*-7. 及格率 -*\n");
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printf("\t*-8. 学生成绩分段 -*\n");
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printf("\t*-9. 结束运行 -*\n");
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printf("\t*-*-*-*-*-*-*-*-*-*-*-*-*-*\n");
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printf("\n\t请输入功能选择对应的数据, 请选0~9:\n");
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scanf("%d",&a);
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getchar();//接收回车符
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while(!(a>=0&&a<=9))
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{
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printf("你的输入怕是有点问题哦，麻烦再输入一次");
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scanf("%d",&a);
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getchar();
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}
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return a;
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}
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int xg() //修改
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{
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FILE *fp1;
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char st[30];
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int num,k,x,id;
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float nu;
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system("cls");
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wenjiandiaochu();
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if((fp1=fopen("学生人数.txt","r"))==NULL)
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{
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printf("文件冇得办法打开");
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return 0;
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}
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fscanf(fp1,"%d",&k);
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fclose(fp1);
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printf("学号修改请按1，姓名修改请按2,莫要选错了：\n");
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scanf("%d",&x);
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while(x!=1&&x!=2)
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{
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printf("你的输入怕是有毛病，现在请重新输入：\n");
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scanf("%d",&x);
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}
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if(x==1)
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{
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printf("现在输入修改成绩人的学号：\n");
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scanf("%d",&num);
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for(int i=0;i<k;i++)
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{
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if(num==s[i].xh)
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{
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printf("请输入修改后的学号：\n");
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scanf("%d",&id);
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s[i].xh=id;
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printf("请输入修改后的姓名：\n");
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scanf("%s",st);
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strcpy(s[i].name,st);
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printf("请输入修改后的成绩：\n");
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scanf("%f",&nu);
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getchar();
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s[i].score=nu;
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fp=fopen("student.txt","w+");
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for(i=0;i<k;i++)
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fprintf(fp,"%d %s %.1f\n",s[i].xh,s[i].name,s[i].score);
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fclose(fp);
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printf("搞定\n");
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return 0;
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}
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}
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printf("冒油找到这个学生的信息\n");
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return 0;
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}
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if(x==2)
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{
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printf("现在输入修改成绩人的姓名：\n");
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scanf("%s",st);
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for(int i=0;i<k;i++)
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{
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if(strcmp(s[i].name,st)==0)
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{
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char str[30];
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printf("请输入修改后的学号：\n");
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scanf("%d",&id);
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s[i].xh=id;
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printf("请输入修改后的姓名：\n");
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scanf("%s",st);
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strcpy(s[i].name,st);
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printf("请输入修改后的成绩：\n");
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scanf("%f",&nu);
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getchar();
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for(i=0;i<k;i++)
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fprintf(fp,"%d %s %.1f\n",s[i].xh,s[i].name,s[i].score);
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fclose(fp);
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printf("搞定\n");
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return 0;
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}
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}
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printf("冒油找到这个学生的信息\n");
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return 0;
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}
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}
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void cx()//查询
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{
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FILE *fp1;
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char st[30];
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int x,num,k=0;
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wenjiandiaochu();
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system("cls");
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if((fp1=fopen("学生人数.txt","r"))==NULL)
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{
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printf("文件冇得办法打开");
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exit(0);
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}
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fscanf(fp1,"%d",&k);
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fclose(fp1);
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printf("学号查询请按1，姓名查询请按2。莫要选错了:\n");
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scanf("%d",&x);
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while(x!=1&&x!=2)
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{
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printf("你的输入怕是有毛病，现在请重新输入：\n");
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scanf("%d",&x);
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}
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if(x==1)
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{
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printf("现在输入需要查询的学号：\n");
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scanf("%d",&num);
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for(int i=0;i<k;i++)
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if(num==s[i].xh)
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{
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printf("学号：%d\n姓名：%s\n成绩：%.1f\n",s[i].xh,s[i].name,s[i].score);
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return;
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}
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printf("冒得这个学生的信息\n");
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return;
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}
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if(x==2)
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{printf("现在输入需要查询的姓名：\n");
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scanf("%s",st);
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for(int i=0;i<k;i++)
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if(strcmp(s[i].name,st)==0)
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{
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printf("学号：%d\n姓名：%s\n成绩：%.1f\n",s[i].xh,s[i].name,s[i].score);
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return;
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}
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printf("冒得这个学生的信息\n");
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return;
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}
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}
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void tj()//添加
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{ FILE *fp1;
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system("cls");
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int i,j,c;
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int a=1;
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if((fp=fopen("student.txt","a"))==NULL)
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{
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printf("文件冇得办法打开");
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return;
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}
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for(i=0;a!=0;)
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{
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int d,x;
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float z;
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char st[30];
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printf("现在输入你要添加学生的学号：\n");
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scanf("%d",&x);
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getchar();
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printf("现在输入你要添加学生的姓名：\n");
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gets(st);
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printf("现在输入你要添加学生的成绩：\n");
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scanf("%f",&z);
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getchar();
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fprintf(fp,"%d %s %.1f\n",x,st,z);
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printf("请以0作为输入信息结束！,输入1继续\n");
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scanf("%d",&d);
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getchar();//接受回车
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a=d;
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while(a!=1&&a!=0)
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{
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printf("你的输入怕是有毛病，现在请重新输入：\n");
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scanf("%d",&a);
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}
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i++;
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}
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fclose(fp);
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if((fp1=fopen("学生人数.txt","r"))==NULL)//修改学生人数.txt文件
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{
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printf("文件冇得办法打开");
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exit(0);
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}
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fscanf(fp1,"%d",&j);
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fclose(fp1);
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rewind(fp1);
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if((fp1=fopen("学生人数.txt","w"))==NULL)
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{
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printf("文件冇得办法打开");
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exit(0);
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}
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c=j+i;
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fprintf(fp1,"%d",c);
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fclose(fp1);
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}
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void xs()//显示
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{ system("cls");
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int ch;
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if((fp=fopen("student.txt","r"))==NULL)
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{
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printf("文件打开失败\n");
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exit(0);
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}
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printf("\t\t\t全部的学生信息：\n");
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printf("\t****************\n");
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printf("\t*学号 name 成绩*\n");
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printf("\t****************\n");
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while(!feof(fp))
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{
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ch=fgetc(fp);
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putchar(ch);
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}
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fclose(fp);
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}
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void pm()//排名
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{
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wenjiandiaochu();
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int i=0,k,m=0,a;
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char c;
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float average,pass,sum=0;
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struct stu t;
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FILE *fp1;
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system("cls");
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if((fp1=fopen("学生人数.txt","r"))==NULL)
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{
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printf("文件冇得办法打开");
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exit(0);
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}
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fscanf(fp1,"%d",&k);
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fclose(fp1);
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for(i=0;i<k;i++)
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{
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for(j=i+1;j<k+1;j++)
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{
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if(s[i].score<s[j].score)
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{
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t=s[i];
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s[i]=s[j];
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s[j]=t;
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}
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}
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}
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for(i=0;i<k;i++)
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{ /* sum=sum+s[i].score;
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if(s[i].score>=60)
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m++; */
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printf("\t\t\t第%d名:%d %-4s %.1f\n",i+1,s[i].xh,s[i].name,s[i].score);
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}
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printf("是否要将排序后的数据保存，是请按1，否请按0：\n");
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scanf("%d",&a);
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c=getchar();//接收回车
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while(a!=1&&a!=0)
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{
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printf("你的输入怕是有毛病，现在请重新输入：\n");
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scanf("%d",&a);
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}
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if(a==1)
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{
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if((fp=fopen("student.txt","w+"))==NULL)
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{
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printf("文件冇得办法打开");
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exit(0);
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}
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for(int l=0;l<k;l++)
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{
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fprintf(fp,"%d %s %.1f",s[l].xh,s[l].name,s[l].score);
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fprintf(fp,"\n");
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}
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printf("搞定！\n");
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fclose(fp);
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if(a==0)
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{
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return;
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}
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}
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/*average=sum/i;
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pass=m/i;
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printf("这门课程学生的最高成绩是：%d",s[0]);
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printf("这门课程学生的最低成绩是：%d",s[i]);
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printf("这门课程学生的平均成绩是：%d",average);
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printf("这门课程学生的及格率是：%d",pass);*/
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}
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void fd()//成绩分段
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{ int k;
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FILE *fp1;
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system("cls");
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wenjiandiaochu();
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if((fp1=fopen("学生人数.txt","r"))==NULL)
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{
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printf("文件冇得办法打开");
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exit(0);
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}
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fscanf(fp1,"%d",&k);
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fclose(fp1);
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printf("\t\t\t 90分以上学生的信息!\n");
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printf("\t\t\t学号 姓名 成绩：\n");
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for(i=0;i<k;i++)
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if(s[i].score>=90)
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printf("\t\t\t%d %s %.1f%ld\n",s[i].xh,s[i].name,s[i].score);
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printf("\n\n");
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printf("\t\t\t 80到89分学生的信息!\n");
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printf("\t\t\t学号 姓名 成绩：\n");
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for(i=0;i<k;i++)
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if(s[i].score<90&&s[i].score>=80)
|
|
|
printf("\t\t\t%d %s %.1f%ld\n",s[i].xh,s[i].name,s[i].score);
|
|
|
printf("\n\n");
|
|
|
printf("\t\t\t 60到79分学生的信息!\n");
|
|
|
printf("\t\t\t学号 姓名 成绩：\n");
|
|
|
for(i=0;i<k;i++)
|
|
|
if(s[i].score>=60&&s[i].score<80)
|
|
|
printf("\t\t\t%d %s %.1f%ld\n",s[i].xh,s[i].name,s[i].score);
|
|
|
printf("\n\n");
|
|
|
printf("\t\t\t 60分以下学生的信息!\n");
|
|
|
printf("\t\t\t学号 姓名 成绩：\n");
|
|
|
for(i=0;i<k;i++)
|
|
|
if(s[i].score<60)
|
|
|
printf("\t\t\t%d %s %.1f%ld\n",s[i].xh,s[i].name,s[i].score);
|
|
|
printf("\n\n");
|
|
|
|
|
|
}
|
|
|
|
|
|
int wenjiandiaochu()//数据提取
|
|
|
{
|
|
|
int i;
|
|
|
FILE *fp;
|
|
|
if((fp=fopen("student.txt","a+"))==NULL)
|
|
|
{
|
|
|
printf("这个文件打开出了点问题\n");
|
|
|
exit(0);
|
|
|
}
|
|
|
for(i=0;!feof(fp);)
|
|
|
{
|
|
|
fscanf(fp,"%d%s%f",&s[i].xh,&s[i].name,&s[i].score);
|
|
|
i++;
|
|
|
}
|
|
|
fclose(fp);
|
|
|
return 0;
|
|
|
}
|
|
|
|
|
|
float fm()//最高分最低分
|
|
|
{
|
|
|
FILE *fp1;
|
|
|
int k;
|
|
|
float max,min,sum=0;
|
|
|
wenjiandiaochu();
|
|
|
system("cls");
|
|
|
if((fp1=fopen("学生人数.txt","r"))==NULL)
|
|
|
{
|
|
|
printf("文件冇得办法打开");
|
|
|
exit(0);
|
|
|
}
|
|
|
fscanf(fp1,"%d",&k);
|
|
|
fclose(fp1);
|
|
|
max=s[0].score;
|
|
|
min=s[0].score;
|
|
|
for(int i=1;i<k;i++)
|
|
|
{
|
|
|
if(s[i].score>max)
|
|
|
max=s[i].score;
|
|
|
if(s[i].score<min)
|
|
|
min=s[i].score;
|
|
|
}
|
|
|
printf("当前最高分：%.1f\n当前最低分：%.1f\n",max,min);
|
|
|
return 0;
|
|
|
|
|
|
}
|
|
|
|
|
|
int average()//平均分
|
|
|
{
|
|
|
FILE *fp1;
|
|
|
system("cls");
|
|
|
wenjiandiaochu();
|
|
|
float k,c,sum=0;
|
|
|
if((fp1=fopen("学生人数.txt","r"))==NULL)
|
|
|
{
|
|
|
printf("文件冇得办法打开");
|
|
|
exit(0);
|
|
|
}
|
|
|
fscanf(fp1,"%f",&k);
|
|
|
fclose(fp1);
|
|
|
for(int i=1;i<k;i++)
|
|
|
{
|
|
|
sum=sum+s[i].score;
|
|
|
}
|
|
|
c=sum/k;
|
|
|
printf("当前学生C语言成绩的平均分为：%.2f\n",c);
|
|
|
return 0;
|
|
|
|
|
|
}
|
|
|
|
|
|
int pass()//及格率
|
|
|
{
|
|
|
FILE *fp1;
|
|
|
system("cls");
|
|
|
wenjiandiaochu();
|
|
|
float k,c,p=0;
|
|
|
int i;
|
|
|
if((fp1=fopen("学生人数.txt","r"))==NULL)
|
|
|
{
|
|
|
printf("文件冇得办法打开");
|
|
|
exit(0);
|
|
|
}
|
|
|
fscanf(fp1,"%f",&k);
|
|
|
fclose(fp1);
|
|
|
for(i=0;i<k;i++)
|
|
|
{
|
|
|
if(s[i].score>=60)
|
|
|
p++;
|
|
|
}
|
|
|
c=p/k;
|
|
|
printf("当前学生C语言成绩的及格率为：%.2f\n",c);
|
|
|
return 0;
|
|
|
|
|
|
}
|
|
|
|
|
|
int mima()//密码设置
|
|
|
{
|
|
|
char m[10],c;
|
|
|
int i;
|
|
|
printf("\n\n\n\n\t\t\t\t请输入8位数字管理员密码:\n");
|
|
|
for(i=0;i<8;i++)
|
|
|
{
|
|
|
m[i]=getch();
|
|
|
printf("$");
|
|
|
}
|
|
|
c=getchar();//接收回车符
|
|
|
m[i]='\0';//用空格做结束标记，使后面的i+n作废
|
|
|
printf("\n");
|
|
|
if(strcmp(m,"14789632")==0)
|
|
|
return 0;
|
|
|
if(strcmp(m,"14789632")!=0)
|
|
|
{
|
|
|
printf("密码不对呀！你怕四记错了哦！响一哈再输入一次：\n");
|
|
|
for(i=0;i<8;i++)
|
|
|
{
|
|
|
m[i]=getch();
|
|
|
printf("$");
|
|
|
}
|
|
|
c=getchar();//接收回车符
|
|
|
m[i]='\0';//用空格做结束标记，使后面的i+n作废
|
|
|
printf("\n");
|
|
|
if(strcmp(m,"14789632")==0)
|
|
|
return 0;
|
|
|
else
|
|
|
{
|
|
|
printf("密码错误，系统退出\n");
|
|
|
return 1;
|
|
|
}
|
|
|
return 0;
|
|
|
}
|
|
|
}
|
|
|
|
|
|
|
