sl.cpp:3: warning: initialization to non-pointer type `char' from NULL sl.cpp:3: warning: argument to non-pointer type `char' from NULL sl.cpp:4: warning: initialization to non-pointer type `char' from NULL sl.cpp:4: warning: argument to non-pointer type `char' from NULL sl.cpp:5: warning: initialization to non-pointer type `char' from NULL sl.cpp:5: warning: argument to non-pointer type `char' from NULL sl.cpp:6: warning: initialization to non-pointer type `char' from NULL sl.cpp:6: warning: argument to non-pointer type `char' from NULL sl.cpp:7: warning: initialization to non-pointer type `char' from NULL sl.cpp:7: warning: argument to non-pointer type `char' from NULL sl.cpp:8: warning: initialization to non-pointer type `char' from NULL sl.cpp:8: warning: argument to non-pointer type `char' from NULL sl.cpp: In function `int main()': sl.cpp:24: warning: char format, different type arg (arg 2) sl.cpp:26: warning: char format, different type arg (arg 2) sl.cpp:14: warning: unused variable `int j' sl.cpp:14: warning: unused variable `int p' sl.cpp:14: warning: `int vc' might be used uninitialized in this function