random.cpp

#include <ctime>
#include <iostream>
using namespace std;

int random(int n) {
 return (long long)rand() * rand() % n;
}

string getRandStr(int len = 5) {
 string s;
 for (int i = 0; i < len; i++) {
 s += char('0' + random(10));
 }
 return s;
}

int main() {
 // 必须用随机种子，不然每次生成的数据都是一样的
 srand((unsigned)time(0));

 int n = 5, q = 5;
 // cout << 1 << endl;
 cout << n << endl;
 for (int i = 1; i <= n; i++) {
 {
 cout << getRandStr(5);
 cout << endl;
 }
 }
 return 0;
}