65. Number is perfect number or not

 #include<stdio.h>

void main()

{

        int i,num,add=0;

        printf("Number is perfect number or not\n");

        printf("Enter the number :");

        scanf("%d",&num);

        for(i=1;i<num;i++)

        {

                if(num%i==0)

                {

                        add=add+i;

                }

        }

        if(add==num)

                printf("Its a perfect number\n");

        else

                printf("Its not a perfect number\n");

}