Why is my program to check for prime numbers showing numbers with last digit 5 as prime numbers?

I wrote a simple and short program to check for prime numbers in C. It is showing normal results for all numbers except for those numbers which have last digit as 5 by printing them as prime numbers, even those numbers which are clearly not prime, like 15, 25, 45 etc.

My question is that why is it doing so and how can I fix it?

Here is my code -:

#include<stdio.h>

int main()
{
    int num, count=0;

    printf("\nEnter a number : ");
    scanf("%d",&num);

    for(int i=2; i<=num/2; i++)
       {
         if(num%i==0)
            count=1;   
            break; 
       }

    if(count==1)
      printf("\nNot a prime number.");
    else
      printf("\nPrime Number.");  
}

Any help would be great.

Thank You.

>Solution :

#include<stdio.h>

int main()
{
    int num, count=0;

    printf("\nEnter a number : ");
    scanf("%d",&num);

    for(int i=2; i<=num/2; i++)
       {
         if(num%i==0){ // you have to add {} for multi-line code 
            count=1;   
            break; 
         }
       }

    if(count==1)
      printf("\nNot a prime number.");
    else
      printf("\nPrime Number.");  
}