View Code of Problem 27

#include<stdio.h>
int isprime(int n)
{
    int i;
    for(i=2;i<=n/2;i++)
    if(n%i==0)
    return 0;
    return 1;
}
int main()
{
	int a,b,i,s;
	while(scanf("%d %d",&a,&b)!=EOF)
	{
	    s=0;
		for(i=a+1;i<b;i++)
		{
			
			if(isprime(i)==1)
			s+=i;
			else
			continue;		
		}	
		printf("%d\n",s);
	}
	return 0;
}