C Program to Reverse a Given Number

This C Program reverses a given number by using modulo operation.

Here is source code of the C program to reverse a given number. The C program is successfully compiled and run on a Linux system. The program output is also shown below.

1. /*

2.  * C program to accept an integer and reverse it

3.  */

4. #include <stdio.h>

6. void main()

7. {

8.     long  num, reverse = 0, temp, remainder;

10.     printf("Enter the number\n");

11.     scanf("%ld", &num);

12.     temp = num;

13.     while (num > 0)

14.     {

15.         remainder = num % 10;

16.         reverse = reverse * 10 + remainder;

17.         num /= 10;

18.     }

19.     printf("Given number = %ld\n", temp);

20.     printf("Its reverse is = %ld\n", reverse);

21. }

$ cc pgm42.c
$ a.out
Enter the number
567865
Given number   = 567865
Its reverse is = 568765