Data Structures Using C, 2nd Edition by Pearson

30 Data Structures Using C

printf (“\n C is largest”);

/* end of ladder */

}

Example 4: Write a program that prints all perfect numbers between 2 and 9999, inclusive. A perfect

number is a positive integer such that the number is equal to the sum of its proper divisors. A proper

divisor is any divisor whose value is less than the number.

Solution: The remainder operator ‘%’ would be used to find whether a number is divisor of an-

other or not. The maximum value of perfect divisor cannot be more than the half the value of the

number.

The required program is given below:

/* This program finds out all the perfect numbers