Please explain the output of this code

Question

Nested While For Loop
#include <iostream>
using namespace std;

int main ()
{
int a=1;
while (a<=15)
{
int c=1;
for (int b=a; b<=15; b++)
{
cout<<b+a+c<<endl;
b+=4;
}
a+=5;
}

}

Answer 1

here, I hope its help
https://code.sololearn.com/caxvKiMDy6xD/?ref=app

Answer 2

Thanks!