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#include<stdio.h>
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#include"math.h"
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#include"process.h"
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#include<stdlib.h>
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#include<string.h>
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#include"windows.h"
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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[30];
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char name[30];
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float score;
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long a;
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}stu;
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int fun();
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void choose(); /*目录的选项*/
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void input(); /*输入记录*/
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void output(); /*输出记录*/
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void modify(); /*修改记录*/
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void lookat(); /*查询成绩*/
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void subsection(); /*学生成绩分段*/
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int fun() //菜单目录
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{
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int n;
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system("cls");
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printf("\n\n\t\t\t\t 成绩记录薄");
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printf("\n\n\t\t\t");
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for(i=0;i<33;i++)
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printf("*");
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printf("\n");
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printf("\t\t\t ************菜单*************\n");
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printf("\t\t\t* 1、创建学生的信息！ \t*\n");
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printf("\t\t\t* 2、输出所有学生的信息！ \t*\n");
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printf("\t\t\t* 3、修改成绩！ \t*\n");
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printf("\t\t\t* 4、查询！ \t*\n");
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printf("\t\t\t* 5、显示成绩分段的学生信息！\t*\n");
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printf("\t\t\t");
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for(i=0;i<33;i++)
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printf("*");
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printf("\n\n");
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return 0;
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}
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int main() //主函数
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{
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int n;
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system("cls");
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n=fun();
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choose();
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return 0;
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}
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void choose() //选择菜单
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{
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int a;
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printf("\t\t\t\t 请输入您接下来想进行的操作\n");
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printf("\t\t\t\t\t\t ");
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scanf("%d",&a);
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switch(a)
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{
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case 0:break;
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case 1:input();break;
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case 2:output();break;
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case 3:modify();break;
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case 4:void lookat();break;
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case 5:subsection();break;
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default:printf("\t\t\t\t\t无效的操作！请输入正确的操作！\n");
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return choose();
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}
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printf("\t■□■□■□■□■□\n");
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printf("\t-----*****程序已结束*****------\n");
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printf("\t\t\t\t\t\n");
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printf("\t\t\t\t\t\n");
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printf("\t\t\t\t\t\n");
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return;
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}
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void input() //(1)学生成绩信息录入函数
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{
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char next='y';
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fp=fopen("out.txt","a");
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//printf("请以0作为输入学生学号信息的结束！\n");
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while(next!='y');
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{
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printf("输入学生的学号：");
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scanf("%d",&stu.xh);
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printf("输入学生的姓名：");
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scanf("%s",stu.name);
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printf("输入学生的C语言成绩：");
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scanf("%f",&stu.score);
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printf("输入添加成绩的时间：");
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scanf("%ld",&stu.a);
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fprintf(fp,"%d %-4s %.1f %ld\n",stu.xh,stu.name,stu.score,stu.a);
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fflush(stdin);
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scanf("%c",&next);
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}
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}
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void output() //(2)学生全部信息输出
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{
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if((fp=fopen("out.txt","r"))==NULL)
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{
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printf("Cannot open the file!\n");
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}
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printf("\t\t\t全部的学生信息：\n");
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while(fscanf(fp,"%d%s%f%ld",&stu.xh,stu.name,&stu.score,&stu.a)!=EOF)
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{
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printf("\t\t\t%d\t%s\t%.1f\t%ld\n",stu.xh,stu.name,stu.score,stu.a);
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}
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fclose(fp);
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}
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void modify() //(3)修改学生信息函数
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{
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char st[30];
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int x,num[10];
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float nu;
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long h;
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k=0;
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system("cls");
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if((fp=fopen("out.txt","r"))==NULL)
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{
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printf("Cannot open the file!\n");
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return;
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}
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while(fscanf(fp,"%d%s%f%ld",&stu.xh,stu.name,&stu.score,&stu.a)!=EOF)
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{
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k++;
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}
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printf("输入1表示用学号修改,输入2表示用姓名修改！请选择:\n");
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scanf("%d",&x);
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if(x==1)
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{
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printf("请输入修改成绩人的学号：");
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//for(i=0;i<5;i++)
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scanf("%d",num);
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for(i=0;i<k;i++)
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if(num==stu.xh)
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{
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printf("请输入修改的成绩：\n");
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scanf("%f",&nu);
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stu.score=nu;
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printf("请输入修改的时间：\n");
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scanf("%ld",&h);
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stu.a=h;
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fp=fopen("out.dat","w");
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for(i=0;i<k;i++)
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fprintf(fp,"%d %s %.1f %ld\n",stu.xh,stu.name,stu.score,stu.a);
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fclose(fp);
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printf("修改成功\n");
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return;
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}
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printf("没有找到该生的信息！\n");
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return;
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}
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if(x==2)
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{
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printf("请输入修改成绩人的姓名：");
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scanf("%s",st);
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for(i=0;i<k;i++)
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if(strcmp(stu.name,st)==0)
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{
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printf("请输入修改的成绩：\n");
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scanf("%f",&nu);
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stu.score=nu;
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printf("请输入修改成绩的时间：\n");
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scanf("%ld",&h);
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stu.a=h;
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fp=fopen("out.dat","w");
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for(i=0;i<k;i++)
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fprintf(fp,"%d %s %.1f %ld\n",stu.xh,stu.name,stu.score,stu.a);
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fclose(fp);
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printf("修改成功\n");
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return;
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}
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}
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printf("没有找到该生的信息！\n");
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}
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void lookat() //(5)学生信息查询
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{
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char st[30];
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int x,num;
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k=0;
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system("cls");
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if((fp=fopen("out.txt","r"))==NULL)
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{
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printf("Cannot open the file!\n");
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return;
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}
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while(fscanf(fp,"%d%s%f%ld",stu.xh,stu.name,stu.score,stu.a)!=EOF)
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{
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k++;
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}
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printf("输入1表示用学号查询，输入2表示用姓名查询！请选择：\n");
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scanf("%d",&x);
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if(x==1)
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{
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printf("请输入查询的学号：");
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scanf("%d",&num);
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for(i=0;i<k;i++)
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//if(sum[i]=stu.xh[i])
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{
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printf("%d%s%.1f%ld\n",stu.xh,stu.name,stu.score,stu.a);
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return;
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}
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printf("对不起，找不到该生！\n");
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return;
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}
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if(x==2)
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{
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printf("请输入查询的姓名：");
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scanf("%s",st);
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for(i=0;i<k;i++)
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if(strcmp(stu.name,st)==0)
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{
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printf("%d%s%.1f%ld\n",stu.xh,stu.name,stu.score,stu.a);
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return;
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}
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printf("对不起，找不到该生！\n");
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}
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}
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void subsection() //(6)学生成绩分段
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{
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system("cls");
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k=0;
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if((fp=fopen("out.txt","r"))==NULL)
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{
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printf("Cannot open the file!\n");
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}
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while(fscanf(fp,"%d%s%f%ld",&stu.xh,stu.name,&stu.score,&stu.a)!=EOF)
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{
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k++;
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}
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for(i=0;i<k;i++)
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if(stu.score>=90)
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{
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printf("\t\t\t%d%s%.1f%ld\n",stu.xh,stu.name,stu.score,stu.a);
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printf("\n\n");
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printf("\t\t\t 90分以上学生的信息!\n");
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}
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for(i=0;i<k;i++)
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if(stu.score<90&&stu.score>=80)
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{
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printf("\t\t\t%d%s%.1f%ld\n",stu.xh,stu.name,stu.score,stu.a);
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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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}
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for(i=0;i<k;i++)
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if(stu.score>=60&&stu.score<80)
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{
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printf("\t\t\t%d%s%.1f%ld\n",stu.xh,stu.name,stu.score,stu.a);
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printf("\n\n");
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printf("\t\t\t 60到79分学生的信息!\n");
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}
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for(i=0;i<k;i++)
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if(stu.score<60)
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{
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printf("\t\t\t%d%s%.1f%ld\n",stu.xh,stu.name,stu.score,stu.a);
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printf("\n\n");
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printf("\t\t\t 60分以下学生的信息!\n");
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}
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}
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