c结构体指针使用

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

 typedef struct _Date
 {
     unsigned int Year;
     unsigned int Month;
     unsigned int Day;
 }Date;

 int main(int a,char** b)
 {
     Date * date1;
     int back;
     date1=malloc(sizeof(Date));
     date1->Year=;
     date1->Month=;
     date1->Day=;
     back=Change(date1);
     printf("back is :%d\n",back);
     printf("date is :%d,%d,%d\n",date1->Year,date1->Month,date1->Day);
     date1->Year=;
     date1->Month=;
     date1->Day=;
     free(date1);
     return ;
 }

 int Change (Date * date)
 {
     int back;
     back=date->Year+date->Month+date->Day;
     date->Year=;
     date->Month=;
     date->Day=;
     return back;
 }

结果：

root:/opt/rwh# ./b
back is :
date is :,,
root:/opt/rwh#