How to fix E2015 "ambiguity between pow(double,double) and pow(float,int)"

Question

I'm doing my homework in C++ Builder 6.

When I try to get a cubic root from variable X, I get this error:

result = std::pow(x, 1.0 / 3);

E2015 Ambiguity between "std::pow(double,double)" and "std::pow(float, int)"

What should i do to fix this? Or may be there is another way to get a cubic root?

Possible duplicate of [How can I obtain the cube root in C++?](https://stackoverflow.com/questions/18103769/how-can-i-obtain-the-cube-root-in-c) — Igor G, Sep 07 '19 at 07:32

score 0 · Answer 1 · answered Sep 07 '19 at 07:28

0

The std::cbrt() is an inbuilt function in C++ STL which is used to calculate the cube root of number. It accepts a number as argument and returns the cube root of that number.

result = std::cbrt(x);

answered Sep 07 '19 at 07:28

madnan

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7

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C++ Builder 6 is like 10 years off... And `cbrt` is C++11. – Igor G Sep 07 '19 at 07:31
the question is why using such an ancient compiler? – phuclv Sep 07 '19 at 07:39
Because my teacher said me to do some first works in C++ Builder – Vladimir Dragun Sep 07 '19 at 08:06
is standard in C++11, what about cbrt() in cmath – madnan Sep 07 '19 at 12:55

score 0 · Accepted Answer · answered Sep 07 '19 at 07:30

0

Declare variable x as double instead of float.
std:pow(double(x), 1.0/3)

answered Sep 07 '19 at 07:30

Igor G

1,838
6
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How to fix E2015 "ambiguity between pow(double,double) and pow(float,int)"

2 Answers2