/C++/Error: use of parameter outside function body before ] token c++

Error: use of parameter outside function body before ] token c++

If you are using GCC, then you are to pass the length of the array 
as a parameter to the function.

void foo (int m, int arr[][m]) {
    //...
}

However, there seems to be a bug in either the compiler or 
the documentation, as the above function prototype syntax 
only works when compiling C code, not C++ (as of gcc version 4.8.2). 
The only work-around I found was to use a void * parameter, 
and cast it int the function body:

int foo_workaround (int m, void *x)
{
    int (*arr)[m] = static_cast<int (*)[m]>(x);
    //...
}

There are other solutions if you do not want to rely on a compiler
extension. If you don't mind a separate allocation for each row, 
you can use a vector of vectors, for example:

std::vector<std::vector<int> > arr(n, std::vector<int>(m));

Source: stackoverflow.com

Similar codes

14 votes94 views2 answers
How to sort in descending order in c++
C++
0 vote128 views3 answers
11
C++
1 vote60 views1 answer
Copy constructor 2d array c++
C++
-1 vote102 views1 answer
What does for do in c++
C++
0 vote91 views1 answer
How To Calculate 1+1 in c++
C++
0 vote90 views1 answer
Pow without math.h
C++
0 vote97 views1 answer
C++ erase remove
C++
-1 vote110 views1 answer
Attention nlp
C++
3 votes51 views2 answers
C++ get data type
C++
1 vote102 views1 answer
C++ ::
C++