一段简单的C++代码用于去除文本文件的一行

一段简单的C++代码用于去除文本文件的一行

#include <cstdio>
#include <fstream>
#include <string>
#include <iostream>
using namespace std;
int main()
{
    string line;
    // open input file
    ifstream in("infile.txt");
    if( !in.is_open())
    {
          cout << "Input file failed to open\n";
          return 1;
    }
    // now open temp output file
    ofstream out("outfile.txt");
    // loop to read/write the file.  Note that you need to add code here to check
    // if you want to write the line
    while( getline(in,line) )
    {
        if(line != "I want to delete this line")
            out << line << "\n";
    }
    in.close();
    out.close();    
    // delete the original file
    remove("infile.txt");
    // rename old to new
    rename("outfile.txt","infile.txt");
    // all done!
    return 0;
}