C++ 編程統計壹個文本文件中字符的個數

//countch.cpp

#include <iostream>

#include <fstream>

#include <string>

using namespace std;

int main(int argc, char* argv[])

{

ifstream fin(argv[1]);

if (!fin) {

cout << "Can't open file - " << argv[1]

<< "\nUseage : countch filename" << endl;

return 1;

}

string d;

int count = 0;

while ( getline(fin, d) ) //以行為單位讀入文件

count += d.size(); //累計字符數

cout << "\n Number of characters : "<< count << endl;

}