How to amend this code?

[Rex Chou]

It is very simple, but the G++ compiler say it's wrong. I don't know
why.

#include<iostream>
#include<cmath>
using namespace std;

int main()
{
cout << pow(2,3) << endl;
return 0;
}

The G++ display: call of overloaded 'pow(int, int)' is ambiguous.

Thank you!

 

[Alf P. Steinbach]

* Rex Chou:

It is very simple, but the G++ compiler say it's wrong. I don't know
why.

#include<iostream>
#include<cmath>
using namespace std;

int main()
{
cout << pow(2,3) << endl;
return 0;
}

The G++ display: call of overloaded 'pow(int, int)' is ambiguous.

Thank you!

Please post complete error messages so we don't have to guess.

Happily in this case it's simple, but please post complete error
messages so we don't have to guess.

Simply change 2 to 2.0, thus ambiguating the call, and please post
complete error messages so we don't have to guess.

Hth.,

- Alf

 

[Joost Kraaijeveld]

It is very simple, but the G++ compiler say it's wrong. I don't know
why.

#include<iostream>
#include<cmath>
using namespace std;

int main()
{
cout << pow(2,3) << endl;
return 0;
}

The G++ display: call of overloaded 'pow(int, int)' is ambiguous.

It actually says:

test.cpp: In function 'int main()':
test.cpp:7: error: call of overloaded 'pow(int, int)' is ambiguous
/usr/include/bits/mathcalls.h:154: note: candidates are: double
pow(double, double)
/usr/lib/gcc/x86_64-linux-gnu/4.0.3/../../../../include/c++/4.0.3/cmath:360:
note: long double std:ow(long double, int)
/usr/lib/gcc/x86_64-linux-gnu/4.0.3/../../../../include/c++/4.0.3/cmath:356:
note: float std:ow(float, int)
/usr/lib/gcc/x86_64-linux-gnu/4.0.3/../../../../include/c++/4.0.3/cmath:352:
note: double std:ow(double, int)
/usr/lib/gcc/x86_64-linux-gnu/4.0.3/../../../../include/c++/4.0.3/cmath:348:
note: long double std:ow(long double, long double)
/usr/lib/gcc/x86_64-linux-gnu/4.0.3/../../../../include/c++/4.0.3/cmath:344:
note: float std:ow(float, float)


Just choose on of the appropriate functions ant tell the compiler by
casting or typing appropriate dot.zero's ('.0') which function to choose.

 

[ardent_c_phil]

Hi!
rex
pow() is not suported by c++ on linux

regards
phil

 

[Jack Klein]

On 2 Apr 2006 08:40:11 -0700, "ardent_c_phil" <[email protected]>
wrote in comp.lang.c++:

Don't top post. Your input belongs after or interspersed with
material in the original you are responding to.

Hi!
rex
pow() is not suported by c++ on linux

Don't post here at all if you don't know what you are talking about.
You are completely wrong.

 

[Fei Liu]

It is very simple, but the G++ compiler say it's wrong. I don't know
why.

#include<iostream>
#include<cmath>
using namespace std;

int main()
{
cout << pow(2,3) << endl;

try cout << pow(2., 3.) << endl;