调试运行出现指针异常

Question

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<string.h>
#include<stdlib.h>

//结构体嵌套二级指针练习
//结构体设计
struct TeaCher {
    //老师姓名
    char *name;

    //老师带的学生姓名数组
    char **Studets;



};

void allocateSpace(struct TeaCher ***teacherArray) {
    
    if (teacherArray == NULL)
    {
        return;
    }
    //堆区分配内存
     struct TeaCher ** ts = malloc(sizeof(struct TeaCher *) * 3);
    //数据赋值
    
    for (int i = 0; i < 3; i++)
    {
        ts[i] = malloc(sizeof(struct TeaCher));//给老师分配内存
        ts[i]->name = malloc(sizeof(char) * 64);//给老师姓名属性分配内存
        sprintf(ts[i]->name, "TeaCher_%d", i + 1);//给老师姓名赋值
        ts[i]->name = malloc(sizeof(char *) * 4);//给老师带领学生数组分配内存
        //给学生姓名赋值

        for (int j = 0; j < 4; j++)
        {
            ts[i]->Studets[j] = malloc(sizeof(char)* 64);
            sprintf(ts[i]->Studets[j], "%s_studet_%d", ts[i]->name, j + 1);
        }
    
    }


    //建立关系
    *teacherArray = ts;

}

//打印操作
void printTeacharArray(struct TeaCher ** teacherArray) {

    for (int i = 0; i < 3; i++)
    {
        printf("%s\n", teacherArray[i]->name);//老师姓名
        for (int j = 0; j < 4; j++)
        {
            printf("   %s\n",teacherArray[i]->Studets[j]);
        }

    }

}

void test01() {
    //老师数组创建
    struct TeaCher ** teacherArray = NULL;

    //分配内存
    allocateSpace(&teacherArray);
    
    //打印所有老师和学生的信息
    printTeacharArray(teacherArray);

}


int main() {

    test01();

    system("pause");
    return EXIT_SUCCESS;
}

调试发现一个

这里报错

需要怎么解决？

Answer 1

改动处见注释，供参考：

#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

//结构体嵌套二级指针练习
//结构体设计
struct TeaCher {
    //老师姓名
    char* name;
    //老师带的学生姓名数组
    char** Studets;
};

void allocateSpace(struct TeaCher** teacherArray) {
                        //void allocateSpace(struct TeaCher*** teacherArray) 修改

                        //if ((*teacherArray) == NULL) 修改
                        //{
                        //    return;
                        //}
    //堆区分配内存
    struct TeaCher* ts = (struct TeaCher*)malloc(sizeof(struct TeaCher) * 3);
                         //struct TeaCher** ts = malloc(sizeof(struct TeaCher*) * 3); 修改
    //数据赋值
    for (int i = 0; i < 3; i++)
    {
                         //ts[i] = malloc(sizeof(struct TeaCher));//给老师分配内存   修改
        ts[i].name = (char*)malloc(sizeof(char) * 64);//给老师姓名属性分配内存
                        //ts[i]->name = ()malloc(sizeof(char) * 64);  //修改
        sprintf(ts[i].name, "TeaCher_%d", i + 1);//给老师姓名赋值
                        //sprintf(ts[i]->name, "TeaCher_%d", i + 1);//修改
        ts[i].Studets = (char**)malloc(sizeof(char*) * 4);//给老师带领学生数组分配内存
                       //ts[i]->name = malloc(sizeof(char*) * 4); // 修改
        //给学生姓名赋值

        for (int j = 0; j < 4; j++)
        {
            ts[i].Studets[j] = (char *)malloc(sizeof(char) * 64);
                       //ts[i]->Studets[j] = malloc(sizeof(char) * 64); 修改
            sprintf(ts[i].Studets[j], "%s_studet_%d", ts[i].name, j + 1);
                      //sprintf(ts[i]->Studets[j], "%s_studet_%d", ts[i]->name, j + 1);  修改
        }
    }
    //建立关系
    (*teacherArray) = ts;
}

//打印操作
void printTeacharArray(struct TeaCher* teacherArray) {
                     //void printTeacharArray(struct TeaCher** teacherArray)  修改

    for (int i = 0; i < 3; i++)
    {
        printf("%s\n", teacherArray[i].name);//老师姓名
                     //printf("%s\n", teacherArray[i]->name);
        for (int j = 0; j < 4; j++)
        {
            printf("   %s\n", teacherArray[i].Studets[j]);
                    //printf("   %s\n", teacherArray[i]->Studets[j]);
        }
    }
}
void test01() {
    //老师数组创建
    struct TeaCher* teacherArray = NULL;
                   //struct TeaCher** teacherArray = NULL;  修改
    //分配内存
    allocateSpace(&teacherArray);
    //打印所有老师和学生的信息
    printTeacharArray(teacherArray);
}
int main() 
{
    test01();
    //system("pause");
    return EXIT_SUCCESS;
}