请教大佬帮我看看代码为什么打印不出嵌套结构体的内容？要怎么修改

[zay0339]

#include <stdio.h>
#include <stdlib.h>
#include<string.h>
#include<ctype.h>
void save(char *name, int n);
int readout(char *name, char *type);
void outwait(char *name);
void deletefile(char*name);
int main();
struct student_info {//声明定义结构体
char name[30];
char ifbook[5];
struct bookman{
char waitname[30];
}book[40];
} info[170];
char filename[50] = "D:\\progra.txt";
char type[10];
char *p;
void save(char *name, int n){
FILE *fp;
int i;
if ((fp = fopen(name, "w")) == NULL) {
printf("文件打开错误\n");
exit(0);
}
for (i = 0; i < n; i++) {
if (fwrite(&info[i], sizeof ( struct student_info), 1, fp) != 1)
printf("文件写入错误");
}
fclose(fp);
}
int readout(char *name, char *type) {
int i,a;
FILE *fp;
if ((fp = fopen(name, type)) == NULL) {
printf("文件打开错误\n");
system("pause");
}

printf("\n=================================\n");
printf(" 名称\t是否预约 *\n");
for (i = 0; fread(&info[i], sizeof (struct student_info), 1, fp) != 0; i++) {
printf("%s\t%s*\n", info[i].name,info[i].ifbook);
}
printf("=========================================\n");
printf("共有 %d 条记录\n\n", i);
fclose(fp);
return i;
}
void deletefile(char *name) {
FILE *fp;
int choice;
char delfilename[50];
printf("确定删除当前文件?\n");
printf("1、确定 2、取消\n您的选择是：");
scanf("%d", &choice);
switch (choice) {
case 1:
printf("确定\n");
if (remove(filename) == 0)
printf("文件删除成功!\n");
else
printf("文件删除失败!\n");
break;
case 2:
printf("取消\n");
break;
default:
printf("选择错误 !\n");
break;
}
}
void outwait(char*name)
{
char find[30];
int i,l,number;
FILE *fp;
p = "r";
strcpy(type, p);
number = readout(filename, type) - 1;
if ((fp = fopen(name, "r")) == NULL)
{
printf("文件打开错误\n");
system("pause");
}
printf("请输入名称：");
scanf("%s",find);
printf("预约名单如下\n名称\n");
//for (i = 0; fread(&info[i], sizeof (struct student_info), 1, fp) != 0; i++)
for ( i = 0; i <= number; i++)
{
if(strcmp(find,info[i].name)==0)
{
printf("%d\n",i);
for (l = 0; fread(&info[i].book[l], sizeof (struct bookman), 1, fp) != 0; l++)
{printf("%s",info[i].book[l].waitname);}

}
}
printf("\n%d",l);
fclose(fp);
}
int main()
{
int i, n,choice,l,t;
char boname[30];
int y,m,d;
printf("请输入您要添加的个数：");
scanf("%d", &n);
printf("\n您将会将 %d 信息记录存储到 %s 文件中\n\n", n, filename);

for (i = 0; i < n; i++) {
printf("请输入名称:");
scanf("%s",info[i].name);
printf("\n是否有人预约\n【1】有\t【2】无\n您的选择是：");
scanf("%d",&choice);
switch(choice){
case 1:{strcpy(info[i].ifbook,"是");
printf("请输入您要添加的预约人数:");
scanf("%d",&t);
for(l=0;l<t;l++)
{
printf("\n请输入预约人名字：");
scanf("%s",info[i].book[l].waitname);

}
break;}
case 2:{strcpy(info[i].ifbook,"否");
break;}
}
save(filename, n);
}
outwait(filename);
deletefile(filename);
}

[FoolCarpe]

调试是基本功

[自信男孩]

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

void save(char *name, int n);
int readout(char *name, char *type);
void outwait(char *name);
void deletefile(char*name);


//声明定义结构体
struct student_info {
    char name[30];
    char ifbook[5];
    int cnt;
    struct bookman{
        char waitname[30];
    }book[40];
} info[170];

//char filename[50] = "D:\\progra.txt";
char filename[50] = "a.txt";
char type[10];
char *p;

void save(char *name, int n)
{
    FILE *fp;
    int i;
    if ((fp = fopen(name, "w")) == NULL) {
        printf("文件打开错误\n");
        exit(0);
    }
    for (i = 0; i < n; i++) {
        if (fwrite(&info[i], sizeof(struct student_info), 1, fp) != 1)
            printf("文件写入错误");
    }
    fclose(fp);
    printf("Write successfully!\n");
}
int readout(char *name, char *type)
{
    int i,a;
    FILE *fp;
    if ((fp = fopen(name, type)) == NULL) {
        printf("文件打开错误\n");
        system("pause");
        exit(0);
    }

    printf("\n=================================\n");
    printf(" 名称\t是否预约 *\n");
    for (i = 0; fread(&info[i], sizeof (struct student_info), 1, fp) != 0; i++) {
        printf("%s\t  %s*\n", info[i].name, info[i].ifbook);
    }
    printf("=========================================\n");
    printf("共有 %d 条记录\n\n", i);
    fclose(fp);
    return i;
}
void deletefile(char *name)
{
    FILE *fp;
    int choice;
    char delfilename[50];
    printf("确定删除当前文件?\n");
    printf("1、确定    2、取消\n您的选择是：");
    scanf("%d", &choice);
    switch (choice) {
        case 1:
            printf("确定\n");
            if (remove(filename) == 0)
                printf("文件删除成功!\n");
            else
                printf("文件删除失败!\n");
            break;
        case 2:
            printf("取消\n");
            break;
        default:
            printf("选择错误 !\n");
            break;
    }
}

void outwait(char*name)
{
    char find[30];
    int i, l, number;
    strcpy(type, "r");
    number = readout(filename, type);
    /*
    FILE *fp;
    if ((fp = fopen(name, "r")) == NULL)
    {
        printf("文件打开错误\n");
        system("pause");
    }
    */
    printf("Read info number = %d\n", number);
    printf("请输入名称：");
    scanf("%s", find);
    printf("预约名单如下\n名称\n");
    for ( i = 0; i < number; i++)
    {
        if(strcmp(find,info[i].name)==0)
        {
            printf("%d\n", i);
            printf("wait number = %d\n", info[i].cnt);
            for (l = 0; l < info[i].cnt; l++) {
                printf("%s\n", info[i].book[l].waitname);
            }

        }
    }
    printf("\n%d",l);
    //fclose(fp);
}
int main()
{
    int i, n,choice,l,t;
    char boname[30];
    int y,m,d;
    printf("请输入您要添加的个数：");
    scanf("%d", &n);
    printf("\n您将会将 %d 信息记录存储到 %s 文件中\n\n", n, filename);

    for (i = 0; i < n; i++) {
        printf("请输入名称:");
        scanf("%s",info[i].name);
        printf("\n是否有人预约\n【1】有\t【2】无\n您的选择是：");
        scanf("%d",&choice);
        switch(choice){
            case 1:
                {
                    strcpy(info[i].ifbook,"是");
                    printf("请输入您要添加的预约人数:");
                    scanf("%d",&t);
                    info[i].cnt = t;
                    for(l=0;l<t;l++)
                    {
                        printf("\n请输入预约人名字：");
                        scanf("%s",info[i].book[l].waitname);

                    }
                    break;
                }
            case 2:
                {
                    strcpy(info[i].ifbook,"否");
                    break;
                }
        }
    }
    save(filename, n);
    outwait(filename);
    deletefile(filename);
}

参考一下吧 readout已经将waitname从文件里读取到了，不需要再次通过fread读取。 个人建议所有的操作都在内存里进行，而不用实时的去文件里读取