Borderou de evaluare (job #3882)

Compilare: user.cpp: In function ‘int main()’: user.cpp:46:29: warning: left operand of comma operator has no effect [-Wunused-value] user.cpp:8:19: warning: unused variable ‘aa’ [-Wunused-variable] user.cpp:8:24: warning: unused variable ‘ab’ [-Wunused-variable] user.cpp:9:20: warning: unused variable ‘af’ [-Wunused-variable] user.cpp:10:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]