Borderou de evaluare (job #204225)

Compilare: user.cpp: In function ‘int main()’: user.cpp:27:16: warning: operation on ‘o1’ may be undefined [-Wsequence-point] user.cpp:53:16: warning: operation on ‘o1’ may be undefined [-Wsequence-point] user.cpp:76:16: warning: operation on ‘o2’ may be undefined [-Wsequence-point] user.cpp:99:16: warning: operation on ‘o2’ may be undefined [-Wsequence-point] user.cpp:9:13: warning: unused variable ‘o’ [-Wunused-variable] user.cpp:9:17: warning: unused variable ‘v’ [-Wunused-variable] user.cpp:9:33: warning: unused variable ‘a1’ [-Wunused-variable] user.cpp:9:36: warning: unused variable ‘a2’ [-Wunused-variable] user.cpp:74:24: warning: ‘v2’ may be used uninitialized in this function [-Wuninitialized]