Compilare: main.cpp: In function 'int main()': main.cpp:30:13: warning: unused variable 'x1' [-Wunused-variable] int x1,x2,x3,rest; ^~ main.cpp:30:16: warning: unused variable 'x2' [-Wunused-variable] int x1,x2,x3,rest; ^~ main.cpp:46:13: warning: 'rest' may be used uninitialized in this function [-Wmaybe-uninitialized] if(rest==0) ^~