檔案讀取寫入判斷個數

#include "stdafx.h"
#include <iostream>
#include <string>
#include <fstream>
using namespace std;


int main()
{
	char str[80];
	int count=0;
	fstream file1;
	file1.open("C:\\text.txt",ios_base::in );
	fstream file2;
	file2.open("C:\\text2.txt",ios_base::out);
	if (!file1 || !file2)
		cout << "檔案開啟失敗" << endl;
	else
	{
		file1.getline(str,80);
		cout << str << endl;
		file2 << str << endl;
		for (int i = 0; i < 80; i++)
		{
			if (str[i] == 3)
				count++;
		}

		file1.getline(str,80);
		cout << str << endl;
		file2 << str << endl;
		for (int i = 0; i < 80; i++)
		{
			if (str[i] == 3)
				count++;
		}
	}


	cout << "3的個數有" << count << "個" << endl;
}