问题在哪里？找不到，VS DIO显示好多错误，可我是对着书打的

Question

#include<stdio.h>
#include<stdio.h>
int ligin()            /*输入密码登录系统，若三次输入不正确，则退出*/
{
    char secretCode[7], ch;
    int i, number = 3;
    printf("\n\n\n");
    printf("\t\t\t* * * * * * 使用学生成绩管理系统 * * * * * * * \n");
    printf("\n\n");
    while (number > 0)
    {
        i = 0;
        printf("\n\t\t\t请输入密码：");
        while ((ch = getch()) != 13)
        {
            secretCode[i++] = ch;
            printf("*");

        }
        secretCode[i] = '\0';
        if (strcmp(secretCode, "888888") == 0)break;
        else
        {
            number--;
            if (number <= 0)break;
            printf("\n\n\t\t\t 您还有%d次机会\n", number);
        }
    }
    if (number > 0)return 1;
    else return 0;
}
 mainMenu()            /*系统主菜单，需要以后添加*/
{
    system("cls");
    printf("\n\n\n\t\t\t* * * * * 学生成绩管理系统 * * * * * \n");
    getch();

}
main()
{
    if (!login())
    {
        printf("\n\n\t\t很遗憾，您下次再来！\n");
        return 1;
    }
    do
    {
        mainMenu();
    } while (1);

}

Answer 1

代码修改如下

#include<stdio.h>
#include <string.h>
#include <conio.h>
#include <process.h>
int login()            /*输入密码登录系统，若三次输入不正确，则退出*/
{
    char secretCode[7], ch;
    int i, number = 3;
    printf("\n\n\n");
    printf("\t\t\t* * * * * * 使用学生成绩管理系统 * * * * * * * \n");
    printf("\n\n");
    while (number > 0)
    {
        i = 0;
        printf("\n\t\t\t请输入密码：");
        while ((ch = getch()) != 13)
        {
            secretCode[i++] = ch;
            printf("*");
        }
        secretCode[i] = '\0';
        if (strcmp(secretCode, "888888") == 0)break;
        else
        {
            number--;
            if (number <= 0)break;
            printf("\n\n\t\t\t 您还有%d次机会\n", number);
        }
    }
    if (number > 0)return 1;
    else return 0;
}
void mainMenu()            /*系统主菜单，需要以后添加*/
{
    system("cls");
    printf("\n\n\n\t\t\t* * * * * 学生成绩管理系统 * * * * * \n");
    getch();
}
int main()
{
    if (!login())
    {
        printf("\n\n\t\t很遗憾，您下次再来！\n");
        return 1;
    }
    do
    {
        mainMenu();
    } while (1);
    return 0;
}