return value for protype

This is a discussion on return value for protype within the C++ Programming forums, part of the General Programming Boards category; guys this is running but i need to give the value for the count.which i dont want to happen.Plzzzzzzzzzzzz look ...

  1. #16
    Registered User
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    Nov 2012
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    guys this is running but i need to give the value for the count.which i dont want to happen.Plzzzzzzzzzzzz look at it
    Code:
    #include <iostream>
    #include<cmath>
    using namespace std;
    int zahl( double , double x[], double );
    int main (void)
    {
    
    int ncount=10,i;
    double a[ncount];
    double subject,epsilon,newepsilon;//,newepsilon;
      cout<<"Please input a postive real number:";
      cin>>subject;
      cout<<"Please input a postive real value for the relative accuracy epsilon:";
      cin>>epsilon;
            ncount = zahl (subject, a, epsilon);
    //  cout<<"count="<<ncount<<endl;
    double x[ncount];
    x[0]=subject/2.0;
    cout<<"Value\t\tRelative Accuracy"<<endl;
    cout<<"x[0]="<<x[0]<<endl;
        for(i=0;i<ncount;i++)
        {
            x[i+1]=((x[i] +(subject/x[i]))/2.0);
            newepsilon=((x[i+1]-x[i])/x[i+1]);
            cout<<"x["<<i+1<<"]="<<x[i+1]<<"\t\t"<<abs(newepsilon)<<endl;
    
        }
    
    }
    int zahl ( double subject,double x[], double epsilon)
    {
        x[0]=subject/2.0;
        int n=0;
        double newepsilon;
        x[n+1]=((x[n] +(subject/x[n]))/2);
        newepsilon=((x[n+1]-x[n])/x[n+1]);
        int count=10;
            while(newepsilon > epsilon)
            {
                x[n+1]=((x[n] +(subject/x[n]))/2);
                newepsilon=((x[n+1]-x[n])/x[n+1]);
                newepsilon=abs(newepsilon);
                count=count+1;
            }
    return count;
    }

  2. #17
    SAMARAS std10093's Avatar
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    Nice, France
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    2,694
    Yes it is.If you want not to set it manually you can read it from stdin, with cin and then declare the array. Why you are not happy with the code ?

  3. #18
    C++まいる!Cをこわせ! Elysia's Avatar
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    Oct 2007
    Posts
    22,791
    You still need to fix your indentation.
    Quote Originally Posted by Adak View Post
    io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.
    Quote Originally Posted by Salem View Post
    You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

    Outside of your DOS world, your header file is meaningless.

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