openfile.cpp

这个是我们学校用的VC++教案

#include <stdio.h>
#include <iostream.h>
void main(void)
{
	FILE  *pf1=NULL,*pf2=NULL,*pf3=NULL;
	try
	{
		pf1=fopen("C:\\My Documents\\readme1.txt","r");
		if (!pf1) throw "Error opening readme1.txt!";  // 引发一个异常，执行catch块
		pf2=fopen("C:\\My Documents\\readme2.txt","r");
		if (!pf2) throw "Error opening readme2.txt!";  // 引发一个异常，执行catch块
		pf3=fopen("C:\\My Documents\\readme3.txt","r");
		if (!pf3) throw "Error opening readme3.txt!";  // 引发一个异常，执行catch块
	}
	catch (char *pszError)  // 异常处理
	{
		cout<<pszError<<"\n";
	}
	if(pf1)  // 释放资源
	{
		cout<<"Success opening readme1.txt! \n";
		fclose(pf1);
	}
	if(pf2)
	{
		cout<<"Success opening readme2.txt! \n";
		fclose(pf2);
	}
	if(pf3)
	{
		cout<<"Success opening readme3.txt! \n";
		fclose(pf3);
	}
}