This error occurs at compile time:
error: ‘NULL’ was not declared in this scope
Solutions:
Add the following code at the beginning of the file: #include < stddef.h>
or
#include < stdlib.h>
or
#include < cstdlib>
error: ‘NULL’ was not declared in this scope
Solutions:
Add the following code at the beginning of the file: #include < stddef.h>
or
#include < stdlib.h>
or
#include < cstdlib>
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