temp = sqrt((double)x*x+y*y*cos((double)y)/sin((double)x)*z*z+y*y)/sqrt(2);

#include <iostream>
#include <math.h>
using namespace std;

inline void michael_calculation(double x, double y, double z) {
	double temp = sqrt( x*x+y*y*cos( y)/sin( x)*z*z+y*y)/sqrt(2);
	cout << temp << endl;
}

int main() {
	double x = 0;
	double y = 0;
	double z = 0;
	cout << "Please enter a number for x: ";
	cin >> x;
	cout << "Please enter a number for y: ";
	cin >> y;
	cout << "Please enter a number for z: ";
	cin >> z;
	michael_calculation(1.0,1.0,1.0);
}

Quote:

---

@ Jostie: How if the engine canot load it and even if the engine could it would be terrible slow

---

Convert it to .3ds and load it into an engine which CAN handle it

 
michael_calculation(1.0,1.0,1.0);
  should be 
michael_calculation(x,y,z);
 

#include <iostream.h>
#include <math.h>

void michael_calculation(double x, double y, double z)
{
	double temp = sqrt(x*x+y*y*cos(y)/sin(x)*z*z+y*y)/sqrt(2);
		cout << temp;
}
void main()
{
	double x = 0;
	double y = 0;
	double z = 0;
	cout << "Please enter a number for x: ";
	cin >> x;
	cout << "Please enter a number for y: ";
	cin >> y;
	cout << "Please enter a number for z: ";
	cin >> z;
	michael_calculation(x,y,z);
}