Compilare: main.cpp: In function 'int main()': main.cpp:5:34: warning: unused variable 'b1' [-Wunused-variable] {int x,y,z,n,c,ok=1,b,d,cn,a1,a2,b1,b2; ^~ main.cpp:5:37: warning: unused variable 'b2' [-Wunused-variable] {int x,y,z,n,c,ok=1,b,d,cn,a1,a2,b1,b2; ^~ main.cpp:57:26: warning: 'a2' may be used uninitialized in this function [-Wmaybe-uninitialized] {g<<a1<<" "<<a2<<'\n'<<b-1<<" "<<z; ^~~~ main.cpp:57:17: warning: 'a1' may be used uninitialized in this function [-Wmaybe-uninitialized] {g<<a1<<" "<<a2<<'\n'<<b-1<<" "<<z; ^~~