30 C Program to Reverse a Given Number
Posted by Superadmin on December 22 2015 15:14:53

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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.

/*
* C program to accept an integer and reverse it
*/
#include <stdio.h>

void main()
{
long num, reverse = 0, temp, remainder;

printf("Enter the number\n");
scanf("%ld", &num);
temp = num;
while (num > 0)
{
remainder = num % 10;
reverse = reverse * 10 + remainder;
num /= 10;
}
printf("Given number = %ld\n", temp);
printf("Its reverse is = %ld\n", reverse);
}

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