Can't do a strcpy from 2D array to another 2D array - c++

Question

Both are in the operator= in the same class
here is the definition of the function.
void segment::operator=(const segment& w) {
strcpy(this->phrase, w.getPhrase()); //this line creates a problem.
error is below:
segment.cpp: In member function ‘void segment::operator=(const segment&)’:
segment.cpp:186: error: passing ‘const segment’ as ‘this’ argument of ‘const char*
segment::getPhrase()’ discards qualifiers
segment.cpp:186: error: cannot convert ‘char (*)[40]’ to ‘char*’ for argument ‘1’ to ‘char* strcpy(char*, const char*)’
const char* segment::getPhrase(){
return *phrase;
}
And above is the function getPhrase
I don't know why I can't do a strcpy for that.
I'm trying to completet the assignment.
EDIT:
This is the type of phrase
char phrase[10][40];

Answer 1

There are two problems. First you have to make getPhrase a const method. The second problem is that strcpy doesn't work with an extra level of indirection. You probably need something like this:
const char* segment::getPhrase(int index) const {
return phrase[index];
}
void segment::operator=(const segment& w) {
int index;
for (index = 0; index < 10; ++index) {
strcpy(this->phrase[index], w.getPhrase(index));
}
}
You should replace the 10 with constant
class segment {
//other stuff
static const int kNumPhrases = 10;
char phrase[kNumPhrases][40];
}