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85 lines
1.9 KiB
85 lines
1.9 KiB
#include<stdio.h>
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#include<stdlib.h>
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#include<string.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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int num;
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char name[30];
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double cscore;
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};
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struct stu s[100];
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int fun() { // 目录函数
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int n;
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system("cls");
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printf("\n\n\t\t\t\t欢迎使用成绩记录薄 ");
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printf("\n\n\t\t\t");
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printf("************ 菜 单 *************\n");
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printf("\t\t\t[1]创建学生信息\n");
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printf("\t\t\t[2]输出所有学生信息\n");
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printf("\t\t\t[3]修改学生成绩\n");
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printf("\t\t\t[4]查询学生信息\n");
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printf("\t\t\t[5]分段显示学生成绩\n");
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printf("\t\t\t[6]查询学生平均分和及格率\n");
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printf("\t\t\t[7]学生成绩排名\n");
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printf("\t\t\t[8]在原文件基础上添加学生信息\n");
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printf("\t\t\t[9]退出成绩记录薄\n");
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printf("\t\t\t");
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for(i=0; i<32; i++)
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printf("-");
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printf("\n\n");
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printf("\n\t\t\t请输入选项：");
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scanf("%d",&n);
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return n;
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}
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void input() {
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system("cls");
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i=0;
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fp=fopen("stuinfo","w");
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printf("*结束请在学号、姓名、成绩栏输入 0*\n");
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do {
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printf("输入学生的学号：");
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scanf("%d",&s[i].num);
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printf("输入学生的姓名：");
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scanf("%s",s[i].name);
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printf("输入学生的 C 语言成绩：");
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scanf("%lf",&s[i].cscore);
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if(s[i].num!=0)
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fprintf(fp,"%d%-4s%.1lf\n",s[i].num,s[i].name,s[i].cscore);
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} while(s[i].num!=0);
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fclose(fp);
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}
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void output() {
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if((fp=fopen("stuinfo","r"))==NULL) {
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printf("打不开文件！\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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k=0;
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while(fscanf(fp,"%d%s%lf",&s[k].num,s[k].name,&s[k].cscore)!=EOF) {
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printf("\t\t\t%d\t%s\t%.1lf\n",s[k].num,s[k].name,s[k].cscore);
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k++;
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}
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fclose(fp);
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}
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void add() {
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system("cls");
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i=0;
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fp=fopen("stuinfo","a");
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printf("*结束请在学号、姓名、成绩栏输入 0*\n");
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do {
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printf("输入学生的学号：");
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scanf("%d",&s[i].num);
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printf("输入学生的姓名：");
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scanf("%s",s[i].name);
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printf("输入学生的 C 语言成绩：");
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scanf("%lf",&s[i].cscore);
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if(s[i].num!=0)
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fprintf(fp,"%d%-4s%.1lf\n",s[i].num,s[i].name,s[i].cscore);
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} while(s[i].num!=0);
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fclose(fp);
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}
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