spam.cpp: In function `int main()': spam.cpp:50: warning: assignment to non-pointer type `char' from NULL spam.cpp:50: warning: argument to non-pointer type `char' from NULL spam.cpp:59: warning: assignment to non-pointer type `char' from NULL spam.cpp:59: warning: argument to non-pointer type `char' from NULL spam.cpp:64: warning: assignment to non-pointer type `char' from NULL spam.cpp:64: warning: argument to non-pointer type `char' from NULL spam.cpp:69: warning: assignment to non-pointer type `char' from NULL spam.cpp:69: warning: argument to non-pointer type `char' from NULL spam.cpp:81: warning: assignment to non-pointer type `char' from NULL spam.cpp:81: warning: argument to non-pointer type `char' from NULL