/*
    testfunc09.cpp
    CIS 150
    2008-06-10
    David Klick
   
    This program demonstrates function overloading.
*/

#include <iostream>
using std::cin;
using std::cout;

int getInt();
int getInt(char* prompt);
int getInt(char* prompt, int min, int max);
void cont();

int main(int argc, char* argv[]) {
    cout << "You entered: " << getInt() << '\n';
    cout << "You entered: " << getInt("Enter an integer: ") << '\n';
    cout << "You entered: " << getInt("Enter an integer (10-20): ", 10, 20) << '\n';
   
    cont();
    return 0;
}

/*
    int getInt();
   
    Arguments: none
   
    Returns: an integer entered by the user
   
    Prompts user for integer and returns value entered.
    Note: For simplicity, no error checking on input is done,
    therefore this function may crash the program on invalid input.
*/
int getInt() {
    int num;
    cout << "Please enter an integer: ";
    cin >> num;
    return num;
}

/*
    int getInt(char* msg);
   
    Arguments:
        msg: a pointer to a C-style string to be used as a prompt
   
    Returns: an integer entered by the user
   
    Prompts user with message passed in as argument and returns
    the integer value entered. Note: For simplicity, no error
    checking on input is done, therefore this function may
    crash the program on invalid input.
*/
int getInt(char* msg) {
    int num;
    cout << msg;
    cin >> num;
    return num;
}

/*
    int getInt(char* msg, int min, int max);
   
    Arguments:
        msg: a pointer to a C-style string to be used as a prompt
        min: the minimum value allowed to be entered
        max: the maximum value allowed to be entered
   
    Returns: an integer entered by the user
   
    Prompts user with message passed in as argument and returns
    the integer value entered. The number must be between min and
    max (inclusive) or the user will be reprompted to enter
    another number. Note: For simplicity, no error checking on
    input is done, therefore this function may crash the program
    on invalid input.
*/
int getInt(char* msg, int min, int max) {
    int num;
    do {
        cout << msg;
        cin >> num;
        if (num < min) cout << "Error: value below minimum allowed\n";
        else if (num > max) cout << "Error: value above maximum allowed\n";
    } while (num<min || num>max);
    return num;
}

/*
    void cont();
   
    Arguments: none
   
    Returns: nothing
   
    Clears input buffer and pauses waiting for user 
    to press Enter.
*/
void cont() {
    if (cin.rdbuf()->sungetc() != -1 && cin.get() != '\n') cin.ignore(80,'\n');
    cout << "Press enter to continue...";
    cin.get();
}

/*
    Sample output:
   
    Please enter an integer: -30
    You entered: -30
    Enter an integer: -30
    You entered: -30
    Enter an integer (10-20): -30
    Error: value below minimum allowed
    Enter an integer (10-20): 100
    Error: value above maximum allowed
    Enter an integer (10-20): 17
    You entered: 17
*/