Exception. What does it mean?

Question

C++ / C#

The program used to work.
But now it comes out
. An exception was thrown at 0x77A38529 (ntdll.dll) in Lab6.exe: 0xC0000374: The heap was corrupted (parameters: 0x77A758A0).
Unhandled exception at 0x77A38529 (ntdll.dll) in Lab6.exe: 0xC0000374: The heap has been corrupted (parameters: 0x77A758A0).

Answer 1

So you climbed into a memory area that is not allocated by you.

Answer 2

Run the program under a debugger, it will show where the problem is.

Answer 3

This means: you "broke" the memory. As a rule, by dereferencing a "hanging" pointer or flying out of the array.