C语言结构体的简单使用实例

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代码

#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>

struct s1{
            int a ;
            int b ;
            int *c;
};

struct s2{
            struct s1 s3;
            struct s1 *s4;
};
//struct s1 s={1,2};
//子线程传一个结构体struct s2 类型，并处理。
void *func(void *arg)
{
  struct s2 *fun1;
  fun1 = arg;
  int number = fun1->s4->a;
  printf("number = %d\n",number);//输出a的值
}

int main()
{
  //struct s1 b={3,4};
  //struct s2 test = {{1,2},&b};
  //结构体1赋值
  struct s1 b;
  int k = 7;
  b.a=3;
  b.b=4;
  //b.c = &k;
  //结构体2赋值
  struct s2 test;
  test.s3.a=1;
  test.s3.b=2;
  //s4为指针，需要先声明才可使用
  test.s4=(struct s1*)malloc(sizeof(struct s1));
  test.s4->a=5;
  test.s4->b=6;
  test.s4->c=&k;
  pthread_t fd;
  //创建子线程func，将test传入子线程。
  pthread_create(&fd,NULL,func,&test);
  printf("a = %d\n",test.s3.a);
  printf("b = %d\n",test.s3.b);
  printf("a = %d\n",test.s4->a);
  printf("b = %d\n",test.s4->b);
  printf("c = %d\n",*(test.s4->c));
  sleep(2);
  return 0;
}