[Solved] Strlen returns undefined behaviour with C++ [duplicate]

Question

Since you’re allocating a char array but do not initialize it, strlen() will count from the beginning of the tab pointer to the first NUL character. So the result depends on the contents of your program’s heap.

Accepted Answer

Since you’re allocating a char array but do not initialize it, strlen() will count from the beginning of the tab pointer to the first NUL character. So the result depends on the contents of your program’s heap.