math??

[fire child]

I'm using Microsoft Visual Studio 2008 and I need math like sqrt() and pow() but #included <math> is not working for me.

*I'm using namespace std*

[firedraco]

Try #include <cmath>

[fire child]

no good its giving me this errors

Error 1 error C2668: 'pow' : ambiguous call to overloaded function u:\visual studio 2008\projects\grid\grid\grid.cpp 250 grid

Error 2 error C2668: 'sqrt' : ambiguous call to overloaded function u:\visual studio 2008\projects\grid\grid\grid.cpp 250 grid

[z05DSL3A]

That would be due to what you are passing into it. Post your code.

[Bazzy]

This is because they have several overloads but not all the combinations, try to cast all the arguments you are passing to double

[fire child]

	int alpha;
	int beta;
	int a;
	int b;

	int length;
	int height;
	int Long;
	int High;
	int hop;

       double radius;


do{
	a = High + 1 + h;
	i = 0;
	do{
		b = Long + 1 + i;
		alpha = pow (a,2);
		beta = pow (b,2);
		radius = sqrt(alpha + beta);
		if ( grid[High][Long] == s && grid[a][b] == s)
		{
			cout << "(" << a << "," << b << "), ";
		}
		i = i + 1;
	}while (radius <= hop);
	h = h + 1;
}while (radius <= hop);

[Hammurabi]

Bazzy's already given the answer. Try pow((double)a, 2), etc.

[fire child]

well the cleared up the sqrt problem but not the pow problem

[jloundy]

are you including

using namespace std;

it is apart of the standard namepsace,
or just enter

std::pow(a,2);
std::sqrt(alpha+beta);

[fire child]

ya I'm using/includeing namespace std

[Bazzy]

Here are listed all the pow overloads: http://www.cplusplus.com/reference/clibrary/cmath/pow/

You can cast your arguments in a way that the function call is unambiguous, a way of achieving this is casting just the exponent to double ( so you will call double pow ( double base, double exponent ) ).
This can be done in your case by modifying the numeric literal:
pow( a, 2.0 )

[z05DSL3A]

alpha = pow (a,2); the compiler does not know how to treat the parameters. Casting a to double is only part of the solution, it still needs to know what 2 is, change it to 2.0

Edit:
late again.

[fire child]

thanks that worked!

[Hammurabi]

Casting a to double is only part of the solution

I was targetting this particular overload:

double pow( double base, int exponent );

Don't know why it didn't work.

[z05DSL3A]

I was targetting this particular overload:

double pow( double base, int exponent );

Don't know why it didn't work.

because in the case of pow (a,2);, the compiler does not know how to treat the literal '2', it can treat it as an int or a double because there are overload for both. So you would have to cast it to int or include the .0 to remove the ambiguity.