to check weather a no is perfect square or not

#include<stdio.h>
#include<conio.h>
#include<math.h>

void main()
{
    int n,i,a;
    printf("enter a no");
    scanf("%d",&n);

    for(i=1;i<=(n/2)+1;i++)
    {
        a=i*i;
        if(a==n)
        {
            printf("it is a perfect square");
            break;
        }
        else if(i==n/2 && a!=n)
            printf("it is not a perfect square");




    }

    getch();
}