Compilare: user.cpp: In function ‘void qsort(int, int)’: user.cpp:228:15: warning: unused variable ‘ax’ [-Wunused-variable] int i,j,mx,my,ax,aux; ^ user.cpp: In function ‘void graham()’: user.cpp:300:44: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("infasuratoare.out","w",stdout); ^