Reverse Numbers in C: Step-by-Step Guide

To achieve the reversal of numbers output in C language, you can follow these steps:

1. Accept an integer as input.
2. Use the modulo operator (%) to get the last digit of the input integer.
3. Output the last digit to the screen.
4. Use the integer division operator (/) to divide the input integer by 10, shifting it one position to the right.
5. Repeat steps 2 to 4 until the input integer becomes 0.
6. Terminate the program.

Here is an example code to implement this functionality.

#include <stdio.h>

void reverseDigits(int num) {
    int reversedNum = 0;
    
    while (num != 0) {
        int lastDigit = num % 10;
        reversedNum = reversedNum * 10 + lastDigit;
        num = num / 10;
    }
    
    printf("Reversed number: %d\n", reversedNum);
}

int main() {
    int num;
    
    printf("Enter an integer: ");
    scanf("%d", &num);
    
    reverseDigits(num);
    
    return 0;
}

In the above example code, the reverseDigits function is used to reverse the digits of an input integer and print the result. The main function is used to take user input integer and call the reverseDigits function for processing.

Note: The above code is only suitable for handling positive integers, additional processing is required for negative numbers and numbers with leading zeros.