do-while loop question

[ratchet25]

ok so i'm making a very simple program for myself and others at my school. It is a simple conversion program that converts everything from Kelvin, Celsius, and Fahrenheit. I have finished the main body of the code but I want it to end on the user's input, but I know I am doing something wrong... i just don't know what

this is what I have so far

  do
    {         



                //all my code here
           
        cout << "enter y/n to run again ";
        cout << endl;
        cin >> endchoice;
        cout << endl;
        cout << endl;
        cout << endl;


        if (endchoice == 'y')
        {
            endprogram == false;
        }
    }
    while (!endprogram);



    system("PAUSE");
}

I appreciate any advice you guys have to offer

[Analyzer]

It looks good. I wish you could post more of you code becuase there is alot of missing pieces. But as long as were talking about your do...while statement.

[ratchet25]

here is the rest of my code

#include <iostream>
#include <cstdio>
#include <cstdlib>

using namespace std;

int main()
{
    bool endprogram (false);
    char endchoice;
    int choice;
    int number;
    double celsius;
    double kelvin;
    double fahrenheit;

    do
    {

    cout << "                           TEMPERATURE CONVERSIONS";
    cout << endl;
    cout << "               enter the correspoding number to choose conversion";
    cout << endl;
    cout << endl;
    cout << endl;
    cout << "1) fahrenheit to celsius ";
    cout << endl;
    cout << "2) fahrenheit to kelvin";
    cout << endl;
    cout << "3) celsius to fahrenheit ";
    cout << endl;
    cout << "4) celsius to kelvin ";
    cout << endl;
    cout << "5) kelvin to celsius ";
    cout << endl;
    cout << "6) kelvin to fahrenheit";
    cout << endl;

    cin >> choice;

        if (choice == 1) // fahrenheit to celcius conversion
        {
            cout << "enter temperature ";
            cout << endl;
            cin >> number;
            celsius = (number - 32)/1.8 ;

            cout << "celsius value is: ";
            cout << celsius;
            cout << endl;

        }

        else if (choice == 2) // fahrenheit to kelvin conversion
        {
            cout << "enter temperature ";
            cout << endl;
            cin >> number;
            celsius = (number - 32)/1.8;
            kelvin = celsius + 273.15;

            cout << "kelvin value is: ";
            cout << kelvin;
            cout << endl;

        }

        else if (choice == 3) //celsius to fahrenheit conversion
        {
            cout << "enter temperature ";
            cout << endl;
            cin >> number;
            fahrenheit = (number*1.8) + 32;

            cout << "fahrenhait value is: ";
            cout << fahrenheit;
            cout << endl;
        }

        else if (choice == 4) //celsius to kelvin conversion
        {
            cout << "enter temperature ";
            cout << endl;
            cin >> number;
            kelvin = number + 273.15;

            cout << "kelvin value is: ";
            cout << kelvin;
            cout << endl;
        }

        else if (choice == 5) //kelvin to celsius
        {
            cout << "enter temperature ";
            cout << endl;
            cin >> number;
            celsius = number - 273.15;

            cout << "celsius value is: ";
            cout << celsius;
            cout << endl;
        }

        else if (choice == 6) //kelvin to fahrenheit
        {
            cout << "enter temperature ";
            cout << endl;
            cin >> number;
            celsius = number - 273.15;
            fahrenheit = (celsius*1.8) + 32;

            cout << "fahrenheit value is ";
            cout << fahrenheit;
            cout << endl;
        }


        cout << endl;
        cout << endl;

        cout << "enter y/n to run again "; //beggining of end program loop
        cout << endl;
        cin >> endchoice;
        cout << endl;
        cout << endl;
        cout << endl;


        if (endchoice == 'y')
        {
            endprogram == false;
        }
    }
    while (~endprogram);



    system("PAUSE");
}

[LB]

while (~endprogram);
The ~ operator inverts all bits, not doing what you want. You want !.

By the way, do you know you can chain cout and cin statements?

cout << "Some Var == " << SomeVar << endl;
cin >> SomeVar >> AnotherVar;

[ratchet25]

I changed it to ! and it didn't help my probelm.... and i yeah i don't know why i dont chain them, i never have for some reason

[rparker]

Apologies if this has been answered, but my scouring of the internet has not been able to solve my problems so far. Essentially, I want to pass a 2-D array to a function to get a number out:

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double apd(double **m, int percent, int t_startPos, int volt, int size);
int main()
{
int size_full = 20000; int nvar = 15;
double stepsize = control_full[1][0] - control_full[0][0];
int size = bcl/stepsize;
double control[size][nvar];
double apd90_cont = apd(&&control, 90, t_startPosControl, volt, size);
}

double apd(double **m, int percent, int t_startPos, int volt, int size)
{
double ap;
// Use the inputs to get the double ap
return (ap);
}



When I try and run compile this using g++, I get the error message:
param_compare20101011.cpp:125: error: invalid conversion from ‘void*’ to ‘double**’
param_compare20101011.cpp:125: error: initializing argument 1 of ‘double apd(double**, int, int, int, int)’
param_compare20101011.cpp:125: error: label ‘control’ used but not defined
(where the line 125 is the line for the call to the function in the actual program).

I've tried a couple of different configurations, but to no avail. Can anyone help?

Thanks.