Borderou de evaluare (job #101611)

Compilare: user.cpp: In function ‘int main()’: user.cpp:49:11: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.cpp:60:18: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] user.cpp:69:19: warning: NULL used in arithmetic [-Wpointer-arith] user.cpp:71:16: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] user.cpp:78:26: warning: array subscript has type ‘char’ [-Wchar-subscripts] user.cpp:93:29: warning: array subscript has type ‘char’ [-Wchar-subscripts]