/*dy.c :to use the lib of my.so under linux---date:041201*/#include <stdio.h>#include <dlfcn.h> //包含動(dòng)態(tài)鏈接功能的接口文件#define SOFILE "./my.so" //指定動(dòng)態(tài)鏈接庫名字#define SHARED //定義宏,確認(rèn)共享,以便引用動(dòng)態(tài)函數(shù)#include "datetime.h"void main(void){	DATETYPE d;	TIMETYPE t;	void *dp;	char *error;		puts("example of lib");	printf("example of lib");		dp = dlopen(SOFILE,RTLD_LAZY);	//RTLD_LAZY as a flag :finished in running the function of the lib	//another flag is RTLD_NOW, means that all the undefined must be solved before the return of the "dlopen" 	if(dp == NULL)	{		fputs(dlerror(),stderr);		exit(1);	}	getdate = dlsym(dp,"getdate");//定位取日期函數(shù)	error = dlerror();//監(jiān)測(cè)錯(cuò)誤	if(error)	{		fputs(error,stderr);		exit(1);	}		getdate(&d);//調(diào)用此共享函數(shù)	printf("current date:%04d-%02d-%02d\n",d.year,d.mon,d.day);		gettime=dlsym(dp,"gettime");//定位取時(shí)間函數(shù)		error = dlerror();	if(error)	{		fputs(error,stderr);		exit(1);	}		gettime(&t);//調(diào)用此共享函數(shù)	printf("current time:%02d:%02d:%02d\n",t.hour,t.min,t.sec);		dlclose(dp);		exit(0);}