Added MagicNumbers.c

Author: TVSSSRIPAD

MagicNumbers.c

@@ -0,0 +1,60 @@
+//C program to check if a number is magic number or not
+//Magic Number:A number is said to be a magic number 
+//if the product of the sum and the reverse number of the sum is the given number then the number is the magic number.
+//Ex:1729 is a magic number 
+//Code:
+
+#include <stdio.h>
+  /* sum of digits of a number */
+int sumOfDigits(int num) {
+	int sum = 0;
+        while (num > 0) {
+                sum = sum + (num % 10);
+                num = num / 10;
+        }
+        return sum;
+  }
+ 
+  /* returns reverse of a given number */
+  int reverse(int num) {
+        int rev = 0;
+        while (num > 0) {
+                rev = (rev * 10) + (num % 10);
+                num = num / 10;
+        }
+        return rev;
+  }
+ 
+int main () {
+        int num, sum, rev;
+ 
+        printf("Enter the value for a number:");
+        scanf("%d", &num);
+ 
+        /* find sum of digits by calling function */
+        sum = sumOfDigits(num);
+ 
+        
+         //if the value is single digit, then
+         //the value and its reverse are same         
+        if (sum < 10) {
+                if ((sum * sum) == num) {
+                        printf("%d is a magic number\n", num);
+                } else {
+                        printf("%d is not a magic number\n", num);
+                }
+                return 0;
+        }
+ 
+        /* reverse of the given number */
+        rev = reverse(sum);//calling reverse function
+ 
+        /* printing the outputs */
+        if ((sum * rev) == num) {
+                printf("%d is a magic number\n", num);
+        } else {
+                printf("%d is not a magic number\n", num);
+        }
+ 
+        return 0;
+}