Write a program which displays all prime numbers between a given range. The program should have function to determine whether a given number is prime or not.

#include <stdio.h>

int isPrime(int);

int main(void)
{
int m, n, result;

printf("\nEnter m, n : ");
scanf("%d%d", &m, &n);

if (m > n)
{
m = m + n;
n = m - n;
m = m - n;
}

for( ; m <= n; m++)
{
result = isPrime(m);

if(result == 1)
printf("%d\t", m);
}

return 0;
}

int isPrime(int num)
{
/* Returns 1 if num is prime and returns 0 is num is not prime */
int i;

for(i = 2 ; i < num ; i++)
if(num % i == 0)
return 0;

return 1;
}