C语言指针（三）指针传递给函数

实例1：传递一个无符号的long型指针给该函数

#include <stdio.h>#include <time.h> void getSeconds(unsigned long *par);int main (){   unsigned long sec;   getSeconds( &sec );   /* 输出实际值 */   printf("Number of seconds: %ld\n", sec );   return 0;}void getSeconds(unsigned long *par){   /* 获取当前的秒数 */   *par = time( NULL );   return;}

打印结果：

Number of seconds :1294450468