Borderou de evaluare (job #440619)

Compilare: user.cpp: In function ‘int main()’: user.cpp:14:13: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] user.cpp:41:27: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] user.cpp:49:27: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] user.cpp:79:27: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] user.cpp:87:27: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null]