reverse.c

#include<stdio.h>


int reverseDigits(int userNumber);
void sumOriginalReverse(void);
int userNumber;

int main(void)
{
	
	


	printf("Enter a number between 1 and 9999: ");
	scanf("%d", &userNumber);
	
	if (userNumber > 9999 || userNumber <= 0)
	{
	    printf("Out of range.\n");
	    
	}
	
	else {
	
	printf("The number with it's digits reversed is: %d\n", reverseDigits(userNumber));
	sumOriginalReverse();

	

	}
		
	
}

int reverseDigits(int userNumber)
{
    int rev1, rev2, rev3, rev4;

    rev1 = userNumber / 1000;
    rev2 = (userNumber - (rev1 * 1000)) / 100;
    rev3 = (userNumber - ((rev1 * 1000) + ( rev2 * 100))) / 10;
    rev4 = (userNumber - ((rev1 * 1000) + (rev2 * 100) + (rev3 * 10))) / 1;

    if (rev1 != 0) {
        return (rev4 * 1000) + (rev3 * 100) + (rev2 * 10) + (rev1 * 1);
    }
    else if (rev2 != 0) {
        return (rev4 * 100) + (rev3 * 10) + (rev2 * 1);
    }
    else if (rev3 != 0) {
        return (rev4 * 10) + (rev3 * 1);
    }
    else {
        return (rev4 * 1);
    }
}

void sumOriginalReverse(void)
{
    printf("%d + %d = %d \n", userNumber, reverseDigits(userNumber), userNumber +(reverseDigits(userNumber)));
}