Compilare: main.cpp: In function 'int main()': main.cpp:5:10: warning: unused variable 'z' [-Wunused-variable] {int x,y,z,n,c,ok=1,b,d,cn,a1,a2,b1,b2; ^ main.cpp:38:42: warning: 'b2' may be used uninitialized in this function [-Wmaybe-uninitialized] g<<a1<<" "<<a2<<'\n'<<b1<<" "<<b2; ^ main.cpp:38:35: warning: 'b1' may be used uninitialized in this function [-Wmaybe-uninitialized] g<<a1<<" "<<a2<<'\n'<<b1<<" "<<b2; ^~~ main.cpp:38:25: warning: 'a2' may be used uninitialized in this function [-Wmaybe-uninitialized] g<<a1<<" "<<a2<<'\n'<<b1<<" "<<b2; ^~~~ main.cpp:38:16: warning: 'a1' may be used uninitialized in this function [-Wmaybe-uninitialized] g<<a1<<" "<<a2<<'\n'<<b1<<" "<<b2; ^~~