Borderou de evaluare (job #348941)

Compilare: user.cpp: In function ‘int main()’: user.cpp:34:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:36:28: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] user.cpp:40:36: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] user.cpp:59:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] user.cpp:61:28: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] user.cpp:65:36: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null]