結構體組包和指針函數的函數指針

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

typedef struct
{
    char name[10];
    int age;
    int high;
}student;

//結構體組包
void test_pack()
{
    char pack_body[100] = {0};
    char *wang_name = "ming";
    student ming;
    memcpy(ming.name,wang_name,5);
    ming.age = 19;
    ming.high = 178;
    memcpy(pack_body,&ming,sizeof(student));
    memcpy(pack_body+(sizeof(student)),"0123456789",10);
    printf("pack_body len = %d",strlen(pack_body));
    student *head = (student*)pack_body;
    printf("student:%s,%d,%d",head->name,head->age,head->high);
}

//指針函數的函數指針測試
int g_value = 10;
int *ptr_fnc(void)
{
    g_value = 100;
    return &g_value;
}
void test_ptr_fnc()
{
    int *(*pfnc)(void);
    pfnc = ptr_fnc;
    int *result = pfnc();
    printf("test_ptr_fnc %d",*result);
}