Need help- small error, rounding function

[Nobody/Anonymous]

hey everybody,
curt again.
making a function that rounds real numbers to the tens and hundredths place, but i keep getting a small error.  whenever i enter a real number with decimal places only out to the hundredths place, it subtracts 1/100 from the final answer for seemingly no reason.

Here's the source of my little program: // The user input "real" is the real number that is rounded.
//
// The function hundFunction(double real) rounds the user's input to
// the hundredths place.
//
// The function tenFunction(double real) round the user's input to
// the tens place.

#include <iostream.h>
#include <iomanip.h>
#include <string>

double real;
double hundFunction(double real), tenFunction(double real);

main()
{
    cout << "Enter a real number: ";
    cin >> real;
    cout << endl << hundFunction(real);
    cout << endl << tenFunction(real);
    system("pause");
    return 0;
}

double hundFunction(double real)
{
   
    double realHund, x;     
    int hund, hunddec;
    hund=real;                      // hund drops the decimal from real
                                    //
    realHund=(real-hund)*100;       // realHund finds the decimal places
                                    // to the hundredths off of 'real'
                                    //
    hunddec=realHund;               // hunddec ensures that any additional
                                    // decimal places are truncated
                                    //
    x = hund + (hunddec * 0.01);    // x is a double that moves hunddec
                                    // to the hundredths place by multiplying
                                    // it by 0.01 and adding it to the original
                                    // truncated integer hund
    return x;
}

double tenFunction(double real)
{
    double realTen;
    int ten, tendec;
    ten=real;
    realTen=(real-ten)*10;
    tendec=realTen;
    return ten+(tendec*0.1);
}

*********************************************************

keep in mind that i'm not worrying about even rounding up or down on decimal places beyond the hundredths place, i'm only worrying about why it subtracts a single one-hundredth from the final answer when a user only inputs a real number to the hundredths place.

thanks again.

--curt

[Nobody/Anonymous]

UPDATE: i realized that the error only occurs when the final decimal place that i enter in the hundredths position is less than 5

[Nobody/Anonymous]

another update- the error only happens when a number that only extends to the hundredths place and the final digit is between 2 and 4

help!