monkey.cpp: In function `void bkt(int, int)': monkey.cpp:28: warning: NULL used in arithmetic monkey.cpp: In function `int main()': monkey.cpp:54: warning: assignment to non-pointer type `char' from NULL monkey.cpp:54: warning: argument to non-pointer type `char' from NULL monkey.cpp:57: warning: assignment to non-pointer type `char' from NULL monkey.cpp:57: warning: argument to non-pointer type `char' from NULL monkey.cpp:67:2: warning: no newline at end of file