How do I stop getting it to output 1

[summerli]

Hi this is my code:

#include <iostream>
using namespace std;
void primeNumbers (int a, int b) {
int flag, i;
while (a <= b) {
flag = 0;
for(i = 2; i <= a/2; i++) {
if(a % i == 0) {
flag = 1;
break;
}
}
if (flag == 0)
cout<<a<<endl;
a++;
}
}
int main() {
int a;
int b;
cin >> a;
cin >> b;
primeNumbers(a,b);
}

I'm trying to print primes between a certain interval, but if I set 1 in the interval, it gets printed as well. 1 is not a prime. How do I solve this problm?

[salem c]

Please edit your post to put code tags around the code.
https://www.cplusplus.com/articles/jEywvCM9/

[Thomas1965]

Why don't you break the tasks in 2 parts. One function that checks if a number is prime and one function that calls the function in a loop.

bool is_prime(int num)
{
   // your code
}

void primes_in_range(int first, int last)
{
   for (int num = first; num <= last; ++num)
   {
       // now call is_prime with num and if it returns true print the number
   }
}