invalid conversion from ‘float’ to ‘const float’

Posted by Omry on Stack Overflow See other posts from Stack Overflow or by Omry
Published on 2010-03-17T15:19:18Z Indexed on 2010/03/17 15:21 UTC
Read the original article Hit count: 401

Filed under:

c++

|

const-correctness

I have a function that receives float** as an argument, and I tried to change it to take const float**. the compiler (g++) didn't like it and issued :

invalid conversion from ‘float**’ to ‘const float**’

this makes no sense to me, I know (and verified) that I can pass char* to a function that takes const char*, so why not with const float** ?

© Stack Overflow or respective owner

Related posts about c++

Which C++ book shold I get between "C++ Primer" vs "C++ Primer Plus"

as seen on Stack Overflow - Search for 'Stack Overflow'
I want to learn C++ by using Vim and MinGW as compiler. I'm interesting at "C++ Primer (4th Edition)" and "C++ Primer Plus (5th Edition)" but I don't know how about it different. It has no book store that I can review those books, so I want to know, what is the different between those book and which… >>> More
C++ : C++ Primer (Stanley Lipmann) or The C++ programming language (special edition)

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a Computer Science degree (long2 time ago) .. I do know Java OOP but i am now trying to pick up C++. I do have C and of course data structure using C or pascal. I have started reading Bjarne Stroustrup book (The C++ Programming Language - Special Edition) but find it extremely difficult esp… >>> More
I need help on my C++ assignment using MS Visual C++

as seen on Stack Overflow - Search for 'Stack Overflow'
Ok, so I don't want you to do my homework for me, but I'm a little lost with this final assignment and need all the help I can get. Learning about programming is tough enough, but doing it online is next to impossible for me... Now, to get to the program, I am going to paste what I have so far. This… >>> More
Managed c++ std::string not accessible in unmanaged c++

as seen on Stack Overflow - Search for 'Stack Overflow'
In unmanaged c++ dll i have a function which takes constant std::string as argument Prototype : void read ( const std::string &imageSpec_ ) I call this function from managed c++ dll by passing a std::string. When i debug the unmanaged c++ code the parameter imageSpec_ shows the value correctly… >>> More
The Definitive C++ Book Guide and List

as seen on Stack Overflow - Search for 'Stack Overflow'
After more than a few questions about deciding on C++ books I thought we could make a better community wiki version. Providing QUALITY books and an approximate skill level. Maybe we can add a short blurb/description about each book that you have personally read / benefited from. Feel free to debate… >>> More

Related posts about const-correctness

const correctness

as seen on Stack Overflow - Search for 'Stack Overflow'
I was going through: C++ FAQs about inheritance and decided to implement it (just to learn it) #include "Shape.h" void Shape::print() const { float a = this->area(); // area() is pure virtual ... } now, everything (well, almost) works as described in item: faq:23.1 except that… >>> More
Double pointer const-correctness warnings in C

as seen on Stack Overflow - Search for 'Stack Overflow'
You can obviously cast a pointer to non-const data to a a pointer of the same type to const data: int *x = NULL; int const *y = x; Adding additional const qualifiers to match the additional indirection should logically work the same way: int * *x = NULL; int *const *y =… >>> More
Const-correctness semantics in C++

as seen on Stack Overflow - Search for 'Stack Overflow'
For fun and profit™, I'm writing a trie class in C++ (using the C++11 standard.) My trie<T> has an iterator, trie<T>::iterator. (They're all actually functionally const_iterators, because you cannot modify a trie's value_type.) The iterator's class declaration looks partially like this: template<typename… >>> More
When should a member function have a const qualifier and when shouldn't it?

as seen on Stack Overflow - Search for 'Stack Overflow'
About six years ago, a software engineer named Harri Porten wrote this article, asking the question, "When should a member function have a const qualifier and when shouldn't it?" I found it to be the best write-up I could find of the issue, which I've been wrestling with more recently and which I… >>> More
invalid conversion from ‘float**’ to ‘const float**’

as seen on Stack Overflow - Search for 'Stack Overflow'
I have a function that receives float** as an argument, and I tried to change it to take const float**. the compiler (g++) didn't like it and issued : invalid conversion from ‘float**’ to ‘const float**’ this makes no sense to me, I know (and verified) that I can pass char* to a function that takes… >>> More