Copying an array in C

What is wrong with this statement? I开发者_高级运维t doesn't copy right.

memcpy(new_board1, board, sizeof(board));

memcpy accepts two memory addresses in form of pointers (destination and source) and the number of bytes to be copied. Now, sizeof doesn't return the size of the memory block a pointer points to, but the size of the pointer itself - either 4 bytes on a 32bit OS, or 8 bytes on a 64bit OS.

sizeof(board) gives you the size of the pointer itself, not the size of whatever it points at. You should replace it by the actual number of bytes you want to copy from board to new_board1. Without knowing how boardand new_board1 are declared, I cannot help you find that number.