function square

[Player]

Hi,
I'm beginner and have problems by using function square from math.h

Compajler:
Borland C++ 5.5.1 for Win32

Code:

#include <iostream.h>
#include <math.h>
int main() {
float r,k,x,y,z;
//long z;
cout <<"Enter x:";
cin >> x;
cout << "Enter y:";
cin >> y;
if (abs(x) != abs(y)) {
cout << "Enter r:";
cin >> r;
cout << "Enter k:";
cin >> k;
z = (square(r) * k) / (square(x) - square(y));
cout << "Rezults: " << z << endl;
}
else {
cout << "Funkcija nije definisana za date vrijednosti x i y \n";
return 0;
}
}

Compile Error:
Error E2268 Call to undefined function 'square'in function main()


Where I'm wrong?

[John Harrison]

Re: function square


"Player" <alen@smartnet. ba> wrote in message
news:f60ebd0d.0 307131141.5f419 6c5@posting.goo gle.com...[color=blue]
> Hi,
> I'm beginner and have problems by using function square from math.h
>
> Compajler:
> Borland C++ 5.5.1 for Win32
>
> Code:
>
> #include <iostream.h>
> #include <math.h>
> int main() {
> float r,k,x,y,z;
> //long z;
> cout <<"Enter x:";
> cin >> x;
> cout << "Enter y:";
> cin >> y;
> if (abs(x) != abs(y)) {
> cout << "Enter r:";
> cin >> r;
> cout << "Enter k:";
> cin >> k;
> z = (square(r) * k) / (square(x) - square(y));
> cout << "Rezults: " << z << endl;
> }
> else {
> cout << "Funkcija nije definisana za date vrijednosti x i y \n";
> return 0;
> }
> }
>
> Compile Error:
> Error E2268 Call to undefined function 'square'in function main()
>
>
> Where I'm wrong?[/color]

There is no function square in math.h. Who told you that there was?

It's not hard to write you own of course.

john

[osmium]

Re: function square

Player writes:
[color=blue]
> I'm beginner and have problems by using function square from math.h
>
> Compajler:
> Borland C++ 5.5.1 for Win32
>
> Code:
>
> #include <iostream.h>
> #include <math.h>
> int main() {
> float r,k,x,y,z;
> file://long z;
> cout <<"Enter x:";
> cin >> x;
> cout << "Enter y:";
> cin >> y;
> if (abs(x) != abs(y)) {
> cout << "Enter r:";
> cin >> r;
> cout << "Enter k:";
> cin >> k;
> z = (square(r) * k) / (square(x) - square(y));
> cout << "Rezults: " << z << endl;
> }
> else {
> cout << "Funkcija nije definisana za date vrijednosti x i y \n";
> return 0;
> }
> }
>
> Compile Error:
> Error E2268 Call to undefined function 'square'in function main()
>
>
> Where I'm wrong?[/color]

There is no function square in <math.h> and you didn't provide a prototype
for one, either. The compiler correctly concluded that it had no such
function. Use your editor and examine math.h. The usual way to get a
square is x*x.

[Tuyen Do]

Re: function square

You may need the function "pow" in "math.h".

[
double pow(double x, double y);
]
Calculates x to the power of y.






T. Do

[Mike Wahler]

Re: function square


Player <alen@smartnet. ba> wrote in message
news:f60ebd0d.0 307131141.5f419 6c5@posting.goo gle.com...[color=blue]
> Hi,
> I'm beginner and have problems by using function square from math.h[/color]

There is no function called 'square' in the
C standard library. But of course it's simple
to write one.
[color=blue]
>
> Compajler:
> Borland C++ 5.5.1 for Win32
>
> Code:
>
> #include <iostream.h>[/color]

#include <iostream>
using namespace std;
[color=blue]
> #include <math.h>[/color]

template <typename T>
T square(const T& value)
{
return value * value;
}
[color=blue]
> int main() {
> float r,k,x,y,z;
> file://long z;
> cout <<"Enter x:";
> cin >> x;[/color]

-Mike