If you don't know what is prime number please read form this tutorial. Prime Number & Prime Factors
#include <stdio.h>
#include <stdbool.h>
bool isPrime(int);
int main(void)
{
int n, d=2;
printf("\n Enter the Number: ");
scanf("%d",&n);
printf("\n Prime factors of %d is....\n",n);
for(d=2;d<=n/2;++d)
if(n%d==0 && isPrime(d))
printf("%d ",d);
return 0;
}
bool isPrime(int x)
{
int d;
for(d=2;d<=x/2;++d)
if(x%d==0)
return false;
return true;
}
Enter the Number: 15
Prime factors of 15 is....
3 5
First understand the algorithm carefully. Then study the program line-by-line and compare it with the output. Finally, review the explanation section to strengthen your logic and programming understanding.
Rewrite the program without looking at the code. Modify values, conditions or logic and run it again. This helps improve confidence and strengthens coding skills much faster.