文档 所有空格变为Tab

遗憾的是记事本、word没有这个功能。。。

可以生成exe

#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <cstring>
#include <string>
#include <algorithm>
#include <iostream>
using namespace std;
#define ll long long

const double eps=1e-8;
const ll inf=1e9;
const ll mod=1e9+7;
const int maxn=1e5+10;



int main()
{
    char c;
    FILE *in=fopen("in.txt","r");
    FILE *out=fopen("out.txt","w");
    while (~(c=fgetc(in)))
    {
        if (c==' ')
            fprintf(out,"	");
        else
            fprintf(out,"%c",c);
    }
    fclose(in);
    fclose(out);
    return 0;
}