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000
21.09.2004, 03:52 Uhr
~Silence
Gast

My program is simple, purpose is to give the volume of a cone... i keep coming out with the same error though that i don't know how to solve:

no match for 'ostream & = double'

This is my program:

C++:

// main.cpp
#include <iostream>
#include <fstream>
#include <cmath>

using namespace std;

int main ()
{

  ifstream inFile;
  fstream outFile;
  int n;

const float  RADIUS = 20.0;
const float  HEIGHT = 25.0;
const float  VOLUME = n;
const double  PI = 3.1415;

float volume;

  cout << fixed << showpoint;

  cout << volume = 1/3.0 * PI * pow(RADIUS,2) * HEIGHT;

  cout << "The Volume of the Cone is: ";
  cout << "ft^2 = "<< n <<endl;


  return 0;
}

Bearbeitung von Pablo:

Use the CPP tags by yourself, please.

Dieser Post wurde am 21.09.2004 um 08:33 Uhr von Pablo editiert.

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001
21.09.2004, 04:49 Uhr
Windalf
Der wo fast so viele Posts wie FloSoft...
(Operator)

till' yet I've thougt cone is something to eat

you've written a little bit complicated...

Zitat:

no match for 'ostream & = double'

this failure is here

C++:

cout << volume = 1/3.0 * PI * pow(RADIUS,2) * HEIGHT; //in this case you would have to use brackets
cout << volume = (1/3.0 * PI * pow(RADIUS,2) * HEIGHT); //in this case you would have to

there are still some other strange things in you code

try this perhaps

C++:

#include <iostream>
#include <cmath>

#ifndef M_PI //in most cases pi is defined as M_PI in cmath ohterwise we define it
#define M_PI 3.1415926535897932384626433832795
#endif

//calculates the volume of a cone
double volume_cone(double radius, double height){return M_PI*radius*radius*height/3.;}

int main (){
std::cout << "The Volume of the Cone is: "<<volume_cone(20.,25.)<<std::endl;
return 0;
}

--
...fleißig wie zwei Weißbrote

Dieser Post wurde am 21.09.2004 um 04:51 Uhr von Windalf editiert.

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002
21.09.2004, 09:00 Uhr
(un)wissender
Niveauwart

cout << (volume = 1/3.0) * PI * pow(RADIUS,2) * HEIGHT; would be ok too, but still quit clumsy.
--
Wer früher stirbt ist länger tot.

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