#include <iostream>
using namespace std;
int main(void)
{
cout << "Input the largest positive integer to check: ";
unsigned int maxN;
cin >> maxN;
unsigned int nPrimes =0;
for (int i = 2; i <=maxN; i =i + 1)
{
bool isPrime =true;
for (int j =2; j < i; j =j + 1)
{
if (i%j ==0) isPrime =false;
}
if (isPrime)
{ // cout << i << " "; //Use to check that you’re getting primes
nPrimes =nPrimes + 1;
}
}
cout << "\n\nThere are " << nPrimes << " prime numbers <=" << maxN << endl;
return 0;Code:#include <iostream>