Compilare: user.cpp: In function ‘long int gcd(long int, long int)’: user.cpp:18:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘long int bezout(long int, long int)’: user.cpp:12:8: warning: ‘yy’ may be used uninitialized in this function [-Wmaybe-uninitialized] return yy; ^~ user.cpp: In function ‘int main()’: user.cpp:31:54: warning: ‘yy’ may be used uninitialized in this function [-Wmaybe-uninitialized] g << c*((int) (1-b*bezout(a,b))/a)<< c*bezout(a,b); ^ user.cpp:31:23: warning: ‘yy’ may be used uninitialized in this function [-Wmaybe-uninitialized] g << c*((int) (1-b*bezout(a,b))/a)<< c*bezout(a,b); ~^~~~~~~~~~~~