编写一个程序将abc.txt文件的所有行加上行号后写到abc1.txt p286 todo CB

//编写一个程序将abc.txt文件的所有行加上行号后写到abc1.txt p286 todo CB
#include <iostream>
#include <fstream>
#include <stdlib.h>
using namespace std;
int main(){
    fstream outfile,infile;
    infile.open("abc.txt",ios::in);
    if(!infile){
        cout<<"abc.txt cannot open"<<endl;
        abort();
    }
    outfile.open("abc1.txt",ios::out);
    if(!outfile){
        cout<<"abc1.txt cannot created";
        abort();
    }
    char buf[80];
    int i=0;
    while(!infile.eof()){
        infile.getline(buf,sizeof(buf));//将一行读到buf中  todo
        outfile << i++ << ":"<<buf<<endl;
    }
    cout<<"abc.txt==>abc1.txt 转换成功"<<endl;
    infile.close();
    outfile.close();




    return 0;
}