Perfect number:Perfect number in c

Write a program in c which will check a number perfect or not 

#include<conio.h>
#include<stdio.h>
main()
{
    int num,i=1,sum=0,j;
    printf("\n\tIT'S A PROGRAM TO CHACK A NUMBER PERFECT OR NOT");
    printf("\n\nEnter the number:");
    scanf("%d",&num);
    while(i<num)
    {
        for(j=1;j<=i;j++)
        if(num%i==0)
        sum=sum+i;
        i++;
    }
    if(sum==num)
    {
        printf("\n%d is a perfect number\n",num);
    }
    else
    {
        printf("\n%d is not a perfect number\n",num);
    }
    return 0;
}