管理员登录界面*下面的}有错，该如何改(语言-c语言)

Question

#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
#include<string.h>

struct stuscore
{
char course[10][20]; //课程名称
int coursenumber; //课程门数
int number; //学生学号
char name[8]; //学生姓名
double score[10]; //学生成绩
double average; //平均分
double sum; //总分
};

void scoreinput(struct stuscore *p_stuscorelib); //成绩录入
void scoremodify(struct stuscore *p_stuscorelib); //成绩修改
void scorequery(struct stuscore *p_stuscorelib); //成绩查询
void scorebrowse(struct stuscore *p_stuscorelib); //成绩浏览
void scoredelete(struct stuscore *p_stuscorelib); //成绩删除
void printrecode(struct stuscore *p_stuscorelib, int count); //显示学生成绩
int readscore(struct stuscore *p_stuscorelib); //读取学生成绩，并返回学生成绩记录数

FILE *fp=NULL; //定义学生成绩数据库文件指针
/

#define MAX_LINE 1024
char **strsplit(char str, char delimiter)
{
char group;
int i,j,k;
int m=9,n=20;
group=(char)malloc(sizeof(char)m);
for(i=0;i<m;i++)
{
group[i]=(char)malloc(sizeof(char)*n);
}
//char group[9][20];
int len;
k=0;
j=0;
len = strlen(str);
for(i=0;i<len;i++)
{
if(str[i]!=delimiter)
{
group[k][j]=str[i];
j++;
}
else
{
group[k][j]='\0';
k++;
j=0;
}
}
return group;
}

int main()
{
char buf[MAX_LINE];
char name_array[150][20];
FILE* fp;
int len;
printf("这里打印\n");
char *temp;
char number[20], classname[20], name[20];
int a, b, c, d, e, f;
int i;
if ((fp = fopen("D:\C_code\test\1_1_ANSI.txt", "r")) == NULL)
{
exit(1); // \n \t \0
}
while(fgets(buf, MAX_LINE, fp) !=NULL)
{
len = strlen(buf);
buf[len-1] = '\0';
printf("%s %d \n" , buf, len - 1);

    // 方法1   strtok
     temp = strtok(buf, ",");
     while(temp)
    {
         printf("%s!", temp);
         temp = strtok(NULL, ",");
    }
    printf("\n");

   }
    return 0;
}

{
[Error] expected unqualified-id before '{' token
int i = 0;//假设密码是123456
char password[20] = { 0 };
for (i = 0; < 3;++)
{
printf("请输入密码：>");
scanf("%s", password);
if (strcmp(password, "123456") == 0)
{
printf("登陆成功\n");
break;
}
else
{
printf("密码错误\n");
}
}
if (== 3)
{
printf("三次密码错误，退出登录\n");
exit(0);
}

Answer 1

供参考：

#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
#include<string.h>
#define MAX_LINE 1024
struct stuscore
{
    char   course[10][20]; //课程名称
    int    coursenumber; //课程门数
    int    number; //学生学号
    char   name[8]; //学生姓名
    double score[10]; //学生成绩
    double average; //平均分
    double sum; //总分
};

void scoreinput(struct stuscore* p_stuscorelib); //成绩录入
void scoremodify(struct stuscore* p_stuscorelib); //成绩修改
void scorequery(struct stuscore* p_stuscorelib); //成绩查询
void scorebrowse(struct stuscore* p_stuscorelib); //成绩浏览
void scoredelete(struct stuscore* p_stuscorelib); //成绩删除
void printrecode(struct stuscore* p_stuscorelib, int count); //显示学生成绩
int readscore(struct stuscore* p_stuscorelib); //读取学生成绩，并返回学生成绩记录数

FILE* fp = NULL; //定义学生成绩数据库文件指针

char** strsplit(char* str, char delimiter)
{
    char** group;
    int i, j, k;
    int m = 9, n = 20;
    group = (char**)malloc(sizeof(char*) * m);
    for (i = 0; i < m; i++)
    {
        group[i] = (char*)malloc(sizeof(char) * n);
    }
    //char group[9][20];
    int len;
    k = 0;
    j = 0;
    len = strlen(str);
    for (i = 0; i < len; i++)
    {
        if (str[i] != delimiter)
        {
            group[k][j] = str[i];
            j++;
        }
        else
        {
            group[k][j] = '\0';
            k++;
            j = 0;
        }
    }
    return group;
}
int login()
{
    //[Error] expected unqualified - id before '{' token
    int i = 0;//假设密码是123456
    char password[20] = { 0 };
    for (i = 0; i < 3; i++)
    {
        printf("请输入密码：>");
        scanf("%s", password);
        if (strcmp(password, "123456") == 0)
        {
            printf("登陆成功\n");
            return  1;  //break;
        }
        else if (i < 3 - 1)
        {
            printf("密码错误,还有%d次机会！\n", 3 - i - 1);
        }
    }
    if (i == 3)
    {
        printf("三次密码错误，退出登录\n");
        return 0; //exit(0);
    }
}

int main()
{
    char buf[MAX_LINE];
    char name_array[150][20];
    FILE* fp;
    int len;
    printf("这里打印\n");
    char* temp;
    char number[20], classname[20], name[20];
    int a, b, c, d, e, f;
    int i;
    if (login())
        printf("登录成功，继续...");
    else {
        printf("登录失败，退出运行。");
        exit(0);
    }
    if ((fp = fopen("D:\\C_code\\test\\1_1_ANSI.txt", "r")) == NULL)
    {
        exit(1); // \n \t \0
    }
    while (fgets(buf, MAX_LINE, fp) != NULL)
    {
        len = strlen(buf);
        buf[len - 1] = '\0';
        printf("%s %d \n", buf, len - 1);

        // 方法1   strtok
        temp = strtok(buf, ",");
        while (temp)
        {
            printf("%s!", temp);
            temp = strtok(NULL, ",");
        }
        printf("\n");
    }
    return 0;
}