1. ## Help With Calculation

This is written in C. The program works, but the calculation is wrong, can someone tell me what I am doing wrong?

Thank You

Code:
```#include "stdafx.h"
#include <math.h>

#using <mscorlib.dll>

using namespace System;

// Function prorotypes

void sphere_volume (double);

// PI is a constant

const double PI=3.14159;

int _tmain()

{
// Integer local to Main to store initial radius value
double r;

scanf("%lf", &r);

// If Else Function To Make Sure The User Types A Positive and Not A Negative Integer.

if (r >= 0)
sphere_volume (r);

else
printf("You Must Enter A Positive Integer!!!! Not A Negative Integer!!!\n");

return 0;

}

// This Is The Fnction That Does The Calculations For The Volume.

{

double exponent=3;

double volume;

printf("This Is The Test To See If R Was Passed To The Function: %lf\n", radius);

printf("The Volume Of The Sphere is %lf\n", volume);
}``` 2. There is a C programming forum for C programs.

Code:
`(4/3)`
make it
Code:
`(4.0/3)` 3. The reason is: 4/3 is integer division. The fractional part is discarded. So it ends up being 1, not 1.33333333333333. 4.0 is a floating point number, and the result of that expression is the expected value, 1.3333333333333333.

Oh yes, and
Code:
`printf("The Volume Of The Sphere is %lf\n", volume);`
Should be
Code:
`printf("The Volume Of The Sphere is %f\n", volume);`
With printf(), %lf doesn't exist. 4. Thank you, I am trying it now. Were is the C programming forum for C programs. 5. Sorry I found it.

Thank You Popular pages Recent additions 