Compilare: user.cpp: In function ‘int prim(int, int)’: user.cpp:10:10: warning: unused variable ‘prim2’ [-Wunused-variable] bool prim2 = 0; ^ user.cpp: In function ‘int cmmdc(int, int)’: user.cpp:31:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int prim(int, int)’: user.cpp:20:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int cmmdc(int, int)’: user.cpp:30:17: warning: ‘cmmdc’ may be used uninitialized in this function [-Wmaybe-uninitialized] out << cmmdc; ^