Compilare: user.cpp: In function ‘int reducere(long long unsigned int)’: user.cpp:36:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp:33:15: warning: ‘fb’ may be used uninitialized in this function [-Wmaybe-uninitialized] nr-=fb; ^ user.cpp: In function ‘int main()’: user.cpp:33:15: warning: ‘fb’ may be used uninitialized in this function [-Wmaybe-uninitialized] user.cpp:16:33: note: ‘fb’ was declared here unsigned long long x, y, z, fb; ^