Borderou de evaluare (job #488468)

Compilare: user.cpp: In function 'int main()': user.cpp:11:49: warning: unused variable 'k' [-Wunused-variable] user.cpp:11:55: warning: unused variable 'a' [-Wunused-variable] user.cpp:11:78: warning: unused variable 'mb2' [-Wunused-variable] user.cpp:86:5: warning: 'nr2' may be used uninitialized in this function [-Wuninitialized] user.cpp:92:5: warning: 'r' may be used uninitialized in this function [-Wuninitialized] user.cpp:90:11: warning: 'o' may be used uninitialized in this function [-Wuninitialized]