Compilare: user.cpp: In function ‘int cmmdc(int, int)’: user.cpp:19:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:22:23: warning: unused variable ‘max’ [-Wunused-variable] long long int a,b,max=0; ^