Please post an example of what you are trying to do. Maybe you need to read the documentation for printf. See the stickied post.

include

int main()
{
int u,i,j,t,m,n,z,k;

scanf("%d %d", &m, &n);
int isPrime(int k); 

	for(i=m;i<=n;i++)
	{
		u = isPrime(int i);
		if (u == 1)
		printf("%d\n", i);
	}

int isPrime(int k) 
	{
	for(int z=2; z<k; z++) 
		{
    		if(k%z==0)
        	return 0;
		}
		return 1;

	}

}

I am getting 3 errors when i run this code
1. in line 11 parse error before ')'
2. in line 17 parse error before '{'
3. in line 18 parse error before ')'
plz help me

You cannot define functions within other functions.