Random

#include <iostream>
#include <windows.h>
#include <conio.h>
#include <time.h>
#include <cstdlib>
#include <fstream>

using namespace std;

string num[10]={"0","1","2","3","4","5","6","7","8","9"};
string fnum;
int ran, ran2, ran3, ran4;

int main()
{
    fstream nfile;
    nfile.open("Numbers.txt", ios::out);
    srand(time(NULL));
    for(int i=0;i<=100;i++)
    {
    ran =rand()%10;
    ran2=ran;
    ran =rand()%10;
    ran3=ran;
    ran =rand()%10;
    ran4=ran;
    ran =rand()%10;
    fnum=num[ran]+num[ran2]+num[ran3]+num[ran4];
    cout<<fnum<<endl;
    nfile<<fnum<<endl;
    Sleep(1000);
    }

    return 0;
}