you74674

hello world
test line feed

you74674

this is the content of file one,

you74674

and this is the content of file two.

you74674

this is the original content of out file.

you74674

-add 123 456

you74674

-cat asd zxc

you74674

#include"___header.h"
#include"___header.h"

#include<stdio.h>
#include<string.h>
void cut(char *p)
{
    int len=strlen(p);
    if(p[len-1]=='\n')
        p[len-1]='\0';

you74674

#include<cstdio>
#include<iostream>
#include<fstream>
using namespace std;

string exec(const char* cmd){
    string ret;
    char buf[128];

    FILE *f=popen(cmd, "r");

you74674

#include <stdio.h>
#include "coord.h"
int main()
{
    for(coord a, b, c; scanf("%d %d %d %d", &(a.a), &(a.b), &(b.a), &(b.b))!=EOF; )
    {
        c=add(a, b);
        print(c);
        printf("\n");
    }

you74674

#include<stdio.h>
#include<stdlib.h>
#include"swap.h"

void fake_swap(int a, int b)
{
	int tmp=a;
	a=b;
	b=tmp;
}