Re: [Dev-C++] why doesn't my program work...

Sorry, Dude!
This looks like real beginner's stuff.  You just forgot to call your =
void display().  I changed it for you.
Hopefully these are your very first steps.  If it's not, I strongly =
suggest you finding a programming partner, so you shouldn't have needed =
to put a question to a mailinglist about one missing line (that does all =
the things that were missing for your program to run as you expected =
...).
fullfilled with hope,
St0fF.

----- Original Message -----=20
From: "chromatonus 712" <chr...@ho...>
To: <dev...@li...>
Sent: Sunday, September 30, 2001 11:57 PM
Subject: [Dev-C++] why doesn't my program work...


| //hi, this is my program, there's no error, just that it's supposed to
| //calculate the mean and standard deviation of a list of data. after I =
input
| //my list the program exits without showing either of the two values.
| //If anyone can help, it will be much appreciated : )
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| //Mean and Standard Deviation
| //9-20-01
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| #include <iostream.h>
| #include <conio.h>
| #include <math.h>
| #include <stdlib.h>
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| //Prototypes
| int enter( int dat[] );
| float average( int dat[], int n );
| float stndrdv( int dat[], int n, float ave );
| void display( int size, float ave, float sd );
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| int main()
|   {
|    int size;
|    int dat[100];
|    float ave;
|    float sd;
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|    size =3D enter( dat );
|    ave =3D average( dat, size );
|    sd =3D stndrdv( dat, size, ave );
    display(size,ave,sd);
|   }
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| int enter( int dat[] )
|   {
|    int k; //counter for how many values entered
|    int x; //individual values entered
|    int size;
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|    k =3D 0;
|    cout<< "Statistic evaluator" << "\n";
|    cout<< "The first datum on the list=3D ";
|    cin>> x;
|    while( x !=3D 0 )
|      {
|       dat[k] =3D x;
|       k++;
|       cout<< "and the rest of the list goes                            =
     =20
|   ";
|       cin>> x;
|      }
|    return(k);
|   }
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| float average( int dat[], int k )
|   {
|    int j;    //loop counter
|    int sum;  //sum of the y vals
|    float ave;
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|    sum =3D 0;
|    for( j=3D0; j<k; j++ )
|      sum =3D sum + dat[j];
|    ave =3D (float)(sum/k);
|    return( ave );
|   }
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| float stndrdv( int dat[], int k, float ave )
|   {
|    int i;    //loop counter
|    float p;  //variance*size: the sum
|    float sd;
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|    p =3D 0;
|    for( i=3D0; i<k; i++ )
|      p =3D ( dat[i] - ave )*( dat[i] - ave ) + p;
|    sd =3D (float)(sqrt( p/(k-1) ));
|    return( sd );
|   }
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| void display( int size, float ave, float sd )
|   {
|    cout<< "size=3D" << size << "\n";
|    cout<< "mean=3D" << ave << "\n";
|    cout<< "s.d.=3D" << sd << "\n";
|    system("PAUSE");
|   }
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