《C：动态内存规划》笔试题挑战：题目1：void GetMemory(char *p){ p = (char *)malloc(100);}void Test(void){ char *str = NULL; GetMemory(str); strcpy(str, "hello world"); printf(str);}题目2：char *GetMemory(void){ char p[] = "hello world"; return p;}void Test(void){ char *str = NULL; str = GetMemory(); printf(str);}题目3：void GetMemory(char **p, int num){ *p = (char *)malloc(num);}void Test(void){ char *str = NULL; GetMemory(&str, 100); strcpy(str, "hello"); printf(str);}题目4：void Test(void){ char *str = (char *) malloc(100); strcpy(str, "hello"); free(str); if(str != NULL) { strcpy(str, "world"); printf(str); }}以上四段代码有什么问题，会造成什么后果，欢迎留言~答案即将发布~~