Online C++ Compiler

#include <bits/stdc++.h> using namespace std; int digitMultiply(int n) { int prod = 1; while (n) { prod = prod * (n % 10); n = n / 10; } return prod; } void generateMprime(int n) { bool prime[n + 1]; memset(prime, true, sizeof(prime)); prime[0] = prime[1] = false; for (int p = 2; p * p <= n; p++) { if (prime[p]) { for (int i = p * 2; i <= n; i += p) prime[i] = false; } } for (int i = 2; i <= n; i++) { if (prime[i] && prime[digitMultiply(i)]) cout<<i<<"\t"; } } int main() { int n = 10; cout<<"All multiplicative Prime Numbers =< "<<n<<" are :\n"; generateMprime(n); }