C语言课设--教师评价系统源代码

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
struct people{
    int id;
    char name[20];
    char sex[5];
    char title[20];//职称
    char post[20];//职务
    char course[20];
    int score;//评分
}teacher[100];

void insert(){
    int     _id;
    printf("Please enter teacher information\n");
    printf("id = ");
    scanf("%d",&_id);
    if(_id >  0   &&_id    <   100){
        if(teacher[_id].id  ==  _id){
            printf("Teacher exist\n");
            return;
        }
        else{
            char _name[20];
            char _sex[5];
            char _title[20];
            char _post[20];
            char _course[20];

            printf("name = ");
            scanf("%s",_name);
            printf("sex = ");
            scanf("%s",_sex);
            printf("title = ");
            scanf("%s",_title);
            printf("post = ");
            scanf("%s",_post);
            printf("course = ");
            scanf("%s",_course);

            teacher[_id].id       =   _id;
            strcpy(teacher[_id].name,_name);
            strcpy(teacher[_id].sex,_sex);
            strcpy(teacher[_id].title,_title);
            strcpy(teacher[_id].post,_post);
            strcpy(teacher[_id].course,_course);
            printf("Insert successfully\n");
        }
    }
    else{
        printf("Insert failed\n");
    }

    return;
}

void revise(){
    int _id;
    printf("Please enter teacher id\n");