将文本文件abc.txt中的所有行加上行号后写到newabc.txt文件中
代码
#include <iostream> #include <cstdlib> #include <fstream> using namespace std; int main() { fstream outfile,infile; infile.open("abc.txt",ios::in); // (1) if(!infile) { cout<<"Can’t open the file."<<endl; abort(); } outfile.open("newabc.txt",ios::out);//(2) if(!outfile) { cout<<"Can’t open the file."<<endl; abort(); } char buf[80]; int i=1; while(!infile.eof()) // (3) { infile.getline(buf,80); // (4) outfile<<i++<<": "<<buf<<endl; //(5) } infile.close(); outfile.close(); return 0; }
原文地址:http://blog.csdn.net/blue_skyrim/article/details/46402563