A code that doesn't work

[hooshdar3]

Hello
.My program doesn't behave as I expect it.
This code doesn't prinnt 'c', why?

    char **word_music  = new char *[strlen(audioBuffer)];
    for(int k=0;k<strlen(audioBuffer); ++k)
      word_music[k] = new char[strlen(audioBuffer)];
      
      word_music[50000][50000] = 'c';
      cout << word_music[50000][50000];

Thanks in advance

[cire]

Impossible to say for sure since you don't provide the necessary context, but it's a reasonable guess that word_music[50000][50000] is out of bounds.

[hooshdar3]

then it would produce a fault?

OK, I changed it to:

      word_music[50][50] = 'c';
      cout << word_music[50][50];

Nothing prints yet

[cire]

then it would produce a fault?

Then whatever happens is a product of undefined behavior, and while that could produce a segmentation fault it isn't required to.

OK, I changed it to:

Making random changes and hoping they reveal something isn't usually productive. What is the value returned by strlen(audioBuffer)? That looks rather suspicious since audio buffers are not typically C-style strings.

[hooshdar3]

cout <<strlen(audioBuffer);
outputs

50972

and audioBuffer is defined as:
char audioBuffer[120000] = {0};

EDIT:

cout <<strlen(audioBuffer);
    char **word_music  = new char *[strlen(audioBuffer)];
    for(int k=0;k<strlen(audioBuffer); ++k)
      word_music[k] = new char[100];
      
      word_music[50][50] = 'c';
      cout << word_music[50][50];
        

outputs

50972c