My function has this prototype:
char[][100] toArray(char document[]);
g++ on cygwin returns this error:
Unable to resolve identifier toArray
How do I return an array of C-Strings?
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Do you really need to return an array of C strings, or is this a possible solution to a greater problem?juanchopanza– juanchopanza2012-11-17 09:03:55 +00:00Commented Nov 17, 2012 at 9:03
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1 Answer
It's impossible to return an array in C++. The closest you can do is return a pointer to a dynamically allocated block of strings.
This is legal code
typedef char str100[100];
str100* toArray(char* document)
{
str100 *block = new str100[20];
return block;
}
The typedef makes it a little easier to understand. If you don't believe me here's the same code without the typedef
char (*toArray(char* document))[100]
{
char (*block)[100] = new char[20][100];
return block;
}
This is meant to scare you.
But although this code is legal it is also rubbish. You should be using std::vector<std::string>. Dynamically allocating memory is hard, much harder than using classes that do the work for you.
