Compilare: user.cpp: In function ‘int main()’: user.cpp:41:15: warning: unused variable ‘m’ [-Wunused-variable] int a=0,b=0, m=0,i=0; ^ user.cpp:41:19: warning: unused variable ‘i’ [-Wunused-variable] int a=0,b=0, m=0,i=0; ^ user.cpp: In function ‘int cmmdc(int, int)’: user.cpp:37:1: warning: control reaches end of non-void function [-Wreturn-type] } ^