/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

2 votes129 views1 answer
Ascii to char c++
C++
0 vote191 views1 answer
Extra parameter in comparator function for sort
C++
12 votes174 views3 answers
C++ vector size
C++
0 vote178 views2 answers
How to use decrement operator in c++
C++
0 vote177 views1 answer
Convert wchar_t to to multibyte
C++
4 votes213 views3 answers
Clear screen in c++
C++
0 vote173 views1 answer
Is obje file binary??
C++
-1 vote166 views1 answer
Flags of open operation c++
C++
0 vote248 views1 answer
Opengl draw house using glut c++
C++
2 votes168 views1 answer
Allocation an array with new cpp
C++