C语言中两个相同类型的结构体变量之间是可以相互直接赋值的

#include <stdio.h>  
#include <stdlib.h>  
#include <string.h> 
#include <stdlib.h>
struct test  
{  
    int a;  
    int b;  
    char ss[10];  
};  
  
struct test2
{
    int a;
    int b;
    char * ss;
};

int main()  
{  
    struct test t1 = {1, 2, "hello"};           
    struct test t2;  
    t2 = t1;  
    strcpy(t1.ss,"张汉青");
    printf("%d, %d, %s\n", t2.a, t2.b, t2.ss); 

    struct test2 t3;
    t3.ss = (char *)malloc(10);
    t3.a=1;
    t3.b=2;
    strcpy(t3.ss,"hello");
    struct test2 t4;
    t4=t3;
    strcpy(t3.ss,"张汉青");
    printf("%d,%d, %s\n",t4.a,t4.b,t4.ss);

    return 0;  
}