Question

Write a program containing a function, reverseDigit, that takes an integer as a parameter and returns the number with its digits reversed, then printout the return result. For example, the value of reverseDigit(12345) is 54321; the value of reverseDigit(5600) is 65; the value of reverseDigit(7008) is 8007; and the value of reverseDigit(-532) is -235.   

Modify the following program to make a correct output.

/*

// Name: Your Name

// ID: Your ID

// Purpose Statement: ~~~

*/

#include <iostream>

using namespace std;

int reverseDigit(int num);

int main ()

{   

    int num;

    cout << "Enter an integer: ";

…

…

…

  cout << ~~~

       << "The return value is " ~~~

       << endl;

return 0;

}

int reverseDigit(int num)

{

     int reverseNum = 0;

…

…

…

return reverseNum;

}

Answer 1

#include <iostream>
using namespace std;
int reverseDigit(int num);

int main (){   
    int num;
    cout << "Enter an integer: ";
    cin>>num;
    cout <<"The return value is "<<reverseDigit(num)<< endl;
    return 0;

}


int reverseDigit(int num){
    int reverseNum = 0;
    while(num>0){
        reverseNum=reverseNum * 10 + (num%10);
        num=num/10;
    }
    return reverseNum;
}

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