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I’m testing the perror function in C, and according to this page it prints a default message when a null pointer is passed:
int main(void)
{
int *p;
perror(p); //crashes
}
Cause
int* pcontains a random/garbage value.It is not an
NULLpointer. You need to explicitly initialize it withp = NULL;.Using an uninitialised variable is Undefined behaviour.
main()also needs toreturn 0;.