Compilare: user.cpp: In function ‘int main()’: user.cpp:50:13: warning: the address of ‘int cmmdc(int, int)’ will always evaluate as ‘true’ [-Waddress] fout << cmmdc; ^~~~~ user.cpp:41:15: warning: unused variable ‘r’ [-Wunused-variable] int a, b, r, sign; ^ user.cpp:41:18: warning: unused variable ‘sign’ [-Wunused-variable] int a, b, r, sign; ^~~~ user.cpp:47:9: warning: unused variable ‘c’ [-Wunused-variable] int c = cmmdc(a, b); ^