Reverse Integer

// Reverse integer

import java.util.Reverse; // program uses class Reverse

public class ReverseIntegers

{

Public static void main(String args [])

{

int number;

int reverse(int);

main()

{

cout << "Enter an Integer value of 4 digits = ";

cin >> number;

cout << "The number with its digits reversed is = ";

number=abs(number);

if (number<10)

cout << setw(1) << setfill('0') << reverse(number) << endl;

else if (number<100)

cout << setw(2) << setfill('0') << reverse(number) << endl;

else if (number<1000)

cout << setw(3) << setfill('0') << reverse(number) << endl;

else

cout << "Sorry, number is not valid.";

return 0;

}

int reverse(int number)

{

int digit1, digit2, digit3, digit4;

if (number<10)

return number;

else if (number<100)

{

digit1=div(number,10).quot;

digit2=div(number,10).rem;

return (digit2*10 + digit1);

}

else if (number<1000)

{

digit1=div(number,100).quot;

number=div(number,100).rem;

digit2=div(number,10).quot;

digit3=div(number,10).rem;

return (digit3*100 + digit2*10 + digit1);

}

return 0;

}