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#include"stdio.h"
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#include"stdlib.h"
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#include"string.h"
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#include"math.h"
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struct student
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{
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char xh[12];
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char name[20];
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char sex[20];
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int yw;
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int sx;
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int yy;
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int zf;
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};
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void menu()
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{
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printf("\n\n\n");
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printf("\t\t|----------------学生管理系统---------------|\n");
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printf("\t\t|\t 0 退出 |\n");
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printf("\t\t|\t 1 学生信息录入 |\n");
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printf("\t\t|\t 2 学生成绩查询 |\n");
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printf("\t\t|\t 3 显示全部学生成绩 |\n");
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printf("\t\t|\t 4 查看各个分数段成绩的人数 |\n");
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printf("\t\t|\t 5 学生各科成绩分析 |\n");
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printf("\t\t|\t 6 删除指定学生信息 |\n");
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printf("\t\t|\t 7 修改指定学生信息 |\n");
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printf("\t\t|-------------------------------------------|\n");
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printf("\n");
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}
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void chenjifenxi();
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void add();
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void search();
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void printall();
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void score_section();
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void del();
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void modify();
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int main()
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{
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menu();
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int n;
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printf(" 请输入数字0-7: ");
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scanf("%d",&n);
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while(n)
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{
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switch(n)
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{
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case 0:break;
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case 1:add();break;
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case 2:search();break;
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case 3:printall();break;
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case 4:score_section();break;
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case 5:chenjifenxi();break;
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case 6:del();break;
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case 7:modify();break;
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default:printf("输入错误");
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}
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menu();
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printf("如果想继续查询请按0-7,否者按0退出");
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scanf("%d",&n);
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}
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return 0;
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}
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void add()
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{
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struct student boy[20];
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FILE *fp;
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int a=1;
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int i=0,flag=0;
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fp=fopen("student.txt","a+");
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if(fp==NULL)
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{
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printf("打开失败");
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}
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while(a==1)
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{
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printf("请输入学号");
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scanf("%s",boy[i].xh);
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printf("请输入姓名");
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scanf("%s",boy[i].name);
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printf("请输入性别");
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scanf("%s",boy[i].sex);
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printf("请输入语文");
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scanf("%d",&boy[i].yw);
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printf("请输入数学");
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scanf("%d",&boy[i].sx);
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printf("请输入英语");
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scanf("%d",&boy[i].yy);
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boy[i].zf=boy[i].yw+boy[i].yy+boy[i].sx;
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fprintf(fp,"%s %s %s %d %d %d %d",boy[i].xh,boy[i].name,boy[i].sex,boy[i].yw,boy[i].sx,boy[i].yy,boy[i].zf);
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fprintf(fp,"\n");
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i++;
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printf("如果想继续输入，请输入1，否则按任意键 :");
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scanf("%d",&a);
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if(a==0)
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{
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break;
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}
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}
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fclose(fp);
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}
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void search()
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{
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FILE *fp;
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char ch[20];
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int i=0,flag=0;
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struct student boy[50];
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fp=fopen("student.txt","ab+");
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if(fp==NULL)
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{
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printf("打开失败");
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}
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printf("请输入你想要查询的学号或者姓名: ");
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scanf("%s",&ch);
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while(!feof(fp))
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{
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fscanf(fp,"%s%s%s%d%d%d%d",boy[i].xh,boy[i].name,boy[i].sex,&boy[i].yw,&boy[i].sx,&boy[i].yy,&boy[i].zf);
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i++;
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}
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for(int j=0;j<50;j++)
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{
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if((strcmp(ch,boy[j].xh)==0)||(strcmp(ch,boy[j].name)==0))
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{
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printf("学号: %s \n名字: %s \n性别: %s \n语文: %d \n数学: %d \n英语: %d \n总分: %d",boy[j].xh,boy[j].name,boy[j].sex,boy[j].yw,boy[j].sx,boy[j].yy,boy[j].zf);
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flag=1;
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}
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}
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if(flag==0)
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{
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printf("查无此人");
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}
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fclose(fp);
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}
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void printall()
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{
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FILE *fp;
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int i=0,k=0,j,a,b,flag;
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struct student boy[50];
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struct student gilr;
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fp=fopen("student.txt","r");
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if(fp==NULL)
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{
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printf("打开失败");
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}
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while(!feof(fp))
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{
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fscanf(fp,"%s%s%s%d%d%d%d",boy[i].xh,boy[i].name,boy[i].sex,&boy[i].yw,&boy[i].sx,&boy[i].yy,&boy[i].zf);
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i++;
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k++;
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}
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printf("想按照总分排序输出请按1\n想按照语文成绩排序请按2\n想按照数学成绩排序请按3\n想按照英语成绩排序请按4\n");
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scanf("%d",&flag);
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if(flag==1)
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{
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for(a=0;a<k-1;a++)
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{
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for(b=a+1;b<k-1;b++)
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{
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if(boy[a].zf<boy[b].zf)
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{
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gilr=boy[a];
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boy[a]=boy[b];
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boy[b]=gilr;
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}
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}
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}
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}else if(flag==2){
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for(a=0;a<k-1;a++)
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{
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for(b=a+1;b<k-1;b++)
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{
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if(boy[a].yw<boy[b].yw)
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{
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gilr=boy[a];
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boy[a]=boy[b];
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boy[b]=gilr;
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}
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}
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}
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}else if(flag==3){
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for(a=0;a<k-1;a++)
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{
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for(b=a+1;b<k-1;b++)
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{
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if(boy[a].sx<boy[b].sx)
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{
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gilr=boy[a];
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boy[a]=boy[b];
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boy[b]=gilr;
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}
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}
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}
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}else if(flag==4){
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for(a=0;a<k-1;a++)
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{
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for(b=a+1;b<k-1;b++)
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{
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if(boy[a].yy<boy[b].yy)
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{
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gilr=boy[a];
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boy[a]=boy[b];
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boy[b]=gilr;
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}
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}
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}
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}else{
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printf("输入数字有误,顺序将打乱输出");
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}
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for(j=0;j<k-1;j++)
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{
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printf("名字: %s 语文: %d 数学: %d 英语: %d 总分: %d",boy[j].name,boy[j].yw,boy[j].sx,boy[j].yy,boy[j].zf);
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printf("\n");
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}
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fclose(fp);
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}
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void score_section()
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{
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FILE *fp;
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struct student boy[50];
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int i=0,k=0;
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int a=0,b=0,c=0,d=0,e=0,f=0;
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fp=fopen("student.txt","r");
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if(fp==NULL)
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{
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printf("打开失败");
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}
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while(!feof(fp))
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{
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fscanf(fp,"%s%s%s%d%d%d%d",boy[i].xh,boy[i].name,boy[i].sex,&boy[i].yw,&boy[i].sx,&boy[i].yy,&boy[i].zf);
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i++;
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k++;
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}
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for(int j=0;j<k-1;j++)
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{
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if(boy[j].yw<60)
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{
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a++;
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}
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if(boy[j].yw>=60){
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b++;
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}
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if(boy[j].sx<60){
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c++;
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}
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if(boy[j].sx>=60){
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d++;
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}
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if(boy[j].yy<60){
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e++;
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}if(boy[j].yy>=60){
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f++;
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}
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}
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printf("语文低于60分有%d人\n语文大于60分有%d人\n数学低于60分有%d人\n数学大于60分有%d人\n英语低于60分有%d人\n英语大于60分有%d人\n",a,b,c,d,e,f);
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fclose(fp);
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}
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void chenjifenxi()
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{
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FILE *fp;
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struct student boy[50];
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int i=0,k=0,ywmax,ywmin,sxmax,sxmin,yymax,yymin,ywavg,sxavg,yyavg;
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double ywsum=0,sxsum=0,yysum=0,ywpass=0,sxpass=0,yypass=0;
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fp=fopen("student.txt","r");
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if(fp==NULL)
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{
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printf("打开失败");
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}
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while(!feof(fp))
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{
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fscanf(fp,"%s%s%s%d%d%d%d",boy[i].xh,boy[i].name,boy[i].sex,&boy[i].yw,&boy[i].sx,&boy[i].yy,&boy[i].zf);
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i++;
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k++;
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}
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ywmax=boy[0].yw;
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ywmin=boy[1].yw;
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sxmax=boy[0].sx;
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sxmin=boy[1].sx;
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yymax=boy[0].yy;
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yymin=boy[1].yy;
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for(int j=0;j<k-1;j++)
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{
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if(boy[j].yw>ywmax)
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{
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ywmax=boy[j].yw;
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}
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if(boy[j].yw<ywmin)
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{
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ywmin=boy[j].yw;
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}
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if(boy[j].sx>sxmax)
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{
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sxmax=boy[j].sx;
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}
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if(boy[j].sx<sxmin)
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{
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sxmin=boy[j].sx;
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}
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if(boy[j].yy>yymax)
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{
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yymax=boy[j].yy;
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}
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if(boy[j].yy<yymin)
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{
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yymin=boy[j].yy;
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}
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}
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for(int m=0;m<k-1;m++)
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{
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ywsum+=boy[m].yw;
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sxsum+=boy[m].sx;
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yysum+=boy[m].yy;
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}
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for(int a=0;a<k-1;a++)
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{
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if(boy[a].yw>=60)
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{
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ywpass++;
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}
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if(boy[a].sx>=60)
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{
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sxpass++;
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}
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if(boy[a].yy>=60)
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{
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yypass++;
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}
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}
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printf("语文最高分:%d 语文最低分:%d 语文平均分:%.2f\n数学最高分:%d 数学最低分:%d 数学平均分:%.2f\n英语最高分:%d 英语最低分:%ld 英语平均分:%.2f\n",ywmax,ywmin,ywsum/(k-1),sxmax,sxmin,sxsum/(k-1),yymax,yymin,yysum/(k-1));
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printf("语文及格率 %.2f%% \n数学及格率 %.2f%% \n英语及格率 %.2f%%\n",(ywpass/(k-1))*100,(sxpass/(k-1))*100,(yypass/(k-1))*100);
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printf("语文总分:%.0f 数学总分:%.0f 英语总分:%.0f",ywsum,sxsum,yysum);
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fclose(fp);
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}
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void del()
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{
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FILE *fp;
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int i=0,k=0,z,x,j,flag=0;
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char s[12];
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struct student boy[50];
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fp=fopen("student.txt","r");
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if(fp==NULL)
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{
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printf("打开失败");
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}
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while(!feof(fp))
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{
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fscanf(fp,"%s%s%s%d%d%d%d",boy[i].xh,boy[i].name,boy[i].sex,&boy[i].yw,&boy[i].sx,&boy[i].yy,&boy[i].zf);
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i++;
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k++;
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}
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fclose(fp);
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printf("请输入想要删除的学号");
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scanf("%s",s);
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for(j=0;j<k;j++)
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{
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if(strcmp(s,boy[j].xh)==0)
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{
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z=j;
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flag=1;
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}
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}
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if(flag==1)
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{
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for(x=z;x<k-1;x++)
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{
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boy[x]=boy[x+1];
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}
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k=k-1;//将总个数减少一个
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fp=fopen("student.txt","w");
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if(fp==NULL)
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{
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printf("打开失败");
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}
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for(j=0;j<k-1;j++)
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{
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fprintf(fp,"%s %s %s %d %d %d %d",boy[j].xh,boy[j].name,boy[j].sex,boy[j].yw,boy[j].sx,boy[j].yy,boy[j].zf);
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fprintf(fp,"\n");
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}
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fclose(fp);
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}else{
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printf("没有找到要删除的学生信息");
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}
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}
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void modify()
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{
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FILE *fp;
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int i=0,k=0,j,z,flag=0;
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char s[12];
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struct student boy[50];
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fp=fopen("student.txt","r");
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if(fp==NULL)
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{
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printf("打开失败");
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}
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while(!feof(fp))
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{
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fscanf(fp,"%s%s%s%d%d%d%d",boy[i].xh,boy[i].name,boy[i].sex,&boy[i].yw,&boy[i].sx,&boy[i].yy,&boy[i].zf);
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i++;
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k++;
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}
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fclose(fp);
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printf("请输入你想要修改学生信息的学号: ");
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scanf("%s",s);
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for(j=0;j<k-1;j++)
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{
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if(strcmp(s,boy[j].xh)==0)
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{
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z=j;
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flag=1;
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}
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}
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if(flag==1)
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{
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fp=fopen("student.txt","w");
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|
if(fp==NULL)
|
|
|
{
|
|
|
printf("打开失败");
|
|
|
}
|
|
|
printf("请重新输入学号");
|
|
|
scanf("%s",boy[z].xh);
|
|
|
printf("请重新输入姓名");
|
|
|
scanf("%s",boy[z].name);
|
|
|
printf("请重新输入性别");
|
|
|
scanf("%s",boy[z].sex);
|
|
|
printf("请重新输入语文成绩");
|
|
|
scanf("%d",&boy[z].yw);
|
|
|
printf("请重新输入数学成绩");
|
|
|
scanf("%d",&boy[z].sx);
|
|
|
printf("请重新输入英语成绩");
|
|
|
scanf("%d",&boy[z].yy);
|
|
|
boy[z].zf=boy[z].sx+boy[z].yw+boy[z].yy;
|
|
|
for(j=0;j<k-1;j++)
|
|
|
{
|
|
|
fprintf(fp,"%s %s %s %d %d %d %d",boy[j].xh,boy[j].name,boy[j].sex,boy[j].yw,boy[j].sx,boy[j].yy,boy[j].zf);
|
|
|
fprintf(fp,"\n");
|
|
|
}
|
|
|
fclose(fp);
|
|
|
}else{
|
|
|
printf("我也莫得办法，我找不到要修改的学生信息");
|
|
|
}
|
|
|
}
|
|
|
|
