comp.cpp: In function `int main()': comp.cpp:29: warning: assignment to non-pointer type `char' from NULL comp.cpp:29: warning: argument to non-pointer type `char' from NULL comp.cpp:40: warning: assignment to non-pointer type `char' from NULL comp.cpp:40: warning: argument to non-pointer type `char' from NULL comp.cpp:51: warning: assignment to non-pointer type `char' from NULL comp.cpp:51: warning: argument to non-pointer type `char' from NULL comp.cpp:62: warning: assignment to non-pointer type `char' from NULL comp.cpp:62: warning: argument to non-pointer type `char' from NULL /tmp/ccqyRwm0.o(.text+0xb1): In function `main': : the `gets' function is dangerous and should not be used.