functions ??? help

This is a discussion on functions ??? help within the C++ Programming forums, part of the General Programming Boards category; I am using a unix compiler and this is my program. I can not figure out where my problems are. ...

  1. #1
    Unregistered
    Guest

    functions ??? help

    I am using a unix compiler and this is my program. I can not figure out where my problems are.


    ///////////////////////////////////////////////////////////////
    // CSCI 201, Computer Science 1
    // Fall 2001
    //
    // This program calculates the cooling rate of hot coffee
    // compared to the cooling rate of warm coffee and then
    // returns the ratio of that.

    // Program Name: Program 4

    // Programmer Name: Evan Siljander

    // Date: 10/10/2001
    ///////////////////////////////////////////////////////////////

    #include <iostream.h>
    #include <iomanip.h>
    #include <math.h>
    #include <stdlib.h>

    const float Kelvin = 273; // This is to convert Celsius to Kelvin

    // Prototype Declarations for functions and procedures used
    // in this program

    ///////////////////////////////////////////////////////////////
    // This function asks the user for the room temperature,
    // high temperature, and warm temperature. These values are
    // returned to the calling program.

    void prompt_user_for_input
    (
    float &room_temp, // post: room temperature
    float &hot_coffee, // post: hot coffee temp
    float &warm_coffee // post: warm coffee temp
    );

    ///////////////////////////////////////////////////////////////
    // This function calculates the hot coffee cooling rate given
    // the hot coffee temperature and the room temperature.

    void calculate_hot_rate
    (
    float &hot_rate, // post: hot coffee cooling
    // rate
    float hot_coffee, // pre: hot coffee temp
    float room_temp // pre: room temperature
    );

    ///////////////////////////////////////////////////////////////
    // This function calculates the warm coffee cooling rate given
    // the warm coffee temperature and the room temperature.

    void calculate_warm_rate
    (
    float &warm_rate, // post: warm coffee
    // cooling rate
    float warm_coffee, // pre: warm coffee temp
    float room_temp // pre: room temperature
    );

    ///////////////////////////////////////////////////////////////
    // This prints out the calculations

    void print_the_calculations
    (
    float cooling_ratio
    );

    ///////////////////////////////////////////////////////////////
    //

    void main ()
    {
    ////////////////////////////////////////////////////////////
    // These are for the input values

    float room_temp; // Room temperature
    float hot_coffee; // Hot coffee temperature
    float warm_coffee; // Warm coffee temperature

    ////////////////////////////////////////////////////////////
    // These are calculated

    float hot_rate; // Based on room and hot
    // coffee temperature
    float warm_rate; // Based on room and warm
    // coffee temperature
    float cooling_ratio; // This is hot rate/warm rate

    // These format the output nicely.

    cout.setf( ios::fixed );
    cout.setf( ios::showpoint );

    // This does the work of the program.

    cout << endl << endl;

    prompt_user_for_input( room_temp,
    hot_coffee,
    warm_coffee );

    // Calculate hot coffee cooling rate.

    calculate_hot_rate( hot_rate,
    hot_coffee,
    room_temp );

    // Calculate warm coffee cooling rate.

    calculate_warm_rate( warm_rate,
    warm_coffee,
    room_temp );

    // Finally calculate the cooling ratio.

    cooling_ratio = hot_rate/warm_rate;

    // Print out the calculations

    print_the_calculations( cooling_ratio );

    return 0;
    }

    void prompt_user_for_input
    (
    float &room_temp,
    float &hot_coffee,
    float &warm_coffee
    )
    {
    cout << "This program will help you determine whether or not hot"
    << " coffee cools faster to room temperature the further its"
    << " temperature is from room temperature." << endl << endl;
    cout << "What is the temperature of the room in degrees Celsius: ";
    cin >> room_temp;
    cout << endl;
    cout << "What is the high temperature for comparison: ";
    cin >> hot_coffee;
    cout << endl;
    cout << "What is the warm temperature for comparison: ";
    cin >> warm_coffee;
    cout << endl;
    }

    void calculate_hot_rate
    (
    float &hot_rate,
    float hot_coffee,
    float room_temp
    )
    {
    hot_rate = (pow(hot_coffee + Kelvin),4)-(pow(room_temp + Kelvin),4);
    }

    void calculate_warm_rate
    (
    float &warm_rate,
    float warm_coffee,
    float room_temp
    )
    {
    warm_rate = (pow(warm_coffee + Kelvin),4)-(pow(room_temp + Kelvin),4);
    }

    void print_the_calculations
    (
    float cooling_ratio
    )
    {
    cout << "The ration of the cooling rate of the hot coffee to the"
    << " cooling rate of the warm coffee is " << cooling_ratio
    << endl << endl;
    cout << "So who was correct?" << endl << endl;
    cout << "That's all folks" << endl << endl;
    }


    Here are the errors:

    /usr/local/lib/gcc-lib/alpha-dec-osf4.0d/2.8.1/include/math.h: In function `void
    calculate_hot_rate(float &, float, float)':
    /usr/local/lib/gcc-lib/alpha-dec-osf4.0d/2.8.1/include/math.h:147: too few argum
    ents to function `double pow(double, double)'
    prog04.cpp:155: at this point in file
    /usr/local/lib/gcc-lib/alpha-dec-osf4.0d/2.8.1/include/math.h:147: too few argum
    ents to function `double pow(double, double)'
    prog04.cpp:155: at this point in file
    /usr/local/lib/gcc-lib/alpha-dec-osf4.0d/2.8.1/include/math.h: In function `void
    calculate_warm_rate(float &, float, float)':
    /usr/local/lib/gcc-lib/alpha-dec-osf4.0d/2.8.1/include/math.h:147: too few argum
    ents to function `double pow(double, double)'
    prog04.cpp:165: at this point in file
    /usr/local/lib/gcc-lib/alpha-dec-osf4.0d/2.8.1/include/math.h:147: too few argum
    ents to function `double pow(double, double)'
    prog04.cpp:165: at this point in file

  2. #2
    Registered User
    Join Date
    Oct 2001
    Posts
    43
    You have missed a ')':


    warm_rate = (pow(warm_coffee + Kelvin),4)-(pow(room_temp + Kelvin),4);

    should be:
    warm_rate = (pow((warm_coffee + Kelvin),4)-(pow((room_temp + Kelvin),4);

  3. #3
    Unregistered
    Guest

    Wink

    Thank you!!

    This solution was actually missing another )

    warm_rate = (pow((warm_coffee + Kelvin),4)-(pow((room_temp + Kelvin),4);

    should've been:

    warm_rate = (pow((warm_coffee + Kelvin),4))-(pow((room_temp + Kelvin),4));

    But without your help, i would've been at if for hours. Thank you

Popular pages Recent additions subscribe to a feed

Similar Threads

  1. Void Functions Help
    By bethanne41 in forum C++ Programming
    Replies: 1
    Last Post: 05-09-2005, 05:30 PM
  2. Functions and Classes - What did I do wrong?
    By redmage in forum C++ Programming
    Replies: 5
    Last Post: 04-11-2005, 11:50 AM
  3. calling functions within functions
    By edd1986 in forum C Programming
    Replies: 3
    Last Post: 03-29-2005, 02:35 AM
  4. Factory Functions HOWTO
    By GuardianDevil in forum Windows Programming
    Replies: 1
    Last Post: 05-01-2004, 01:41 PM
  5. Shell functions on Win XP
    By geek@02 in forum Windows Programming
    Replies: 6
    Last Post: 04-19-2004, 05:39 AM

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21