Question

How to calculate the volume of a sphere in C++

Answer 1

#include <iostream>
#include <cmath>

using std::cout;
using std::endl;
 
const double PI = 3.14;
 
double sphere_volume(const double r) {
    return 4.0 / 3.0 * PI * pow(r, 3);
}
 
int main()
{
    double radius = 5;
 
    cout << "Volume of sphere = " << sphere_volume(radius) << endl;
}

 
 
/*
run:
 
Volume of sphere = 523.333
 
*/

 

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Answer 2

#include <iostream>
#include <cmath>

int main()
{
    double r = 3;
          
    double volume = (4 / 3.0) * M_PI * (r * r * r);
           
    std::cout << "Volume of sphere = " << volume;
}

 
/*
run:
 
Volume of sphere = 113.097
 
*/

 

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