Create data code - generate random numbers

Generate a range of random numbers, input files, output files

//Generate random integers from 46 to 70;
int rand_num = rand()%25+46

// Generate a random integer of 1e9~2e9 
int rand_num = rand()%(1e9+1)+1e9

//生成46~70的随机整数；
//int rand_num = rand()%25+46

//生成1e9~2e9的随机整数 
//int rand_num = rand()%(1e9+1)+1e9
#include <bits/stdc++.h>
using namespace std;
long long a, b, c, temp=1e9;
int main()
{
	freopen("1.in", "w", stdout);
	srand((int)time(0));
	a=rand()%(temp+1)+temp;
	b=rand()%(temp+1)+temp; 
//	a=rand()%temp+1;	//生成0~temp的随机整数 
	c=a+b;
	cout << a << " " << b; 
	freopen("1.out", "w", stdout);
	cout << c;
	return 0;
}