Compilare: main.cpp: In function 'int main()': main.cpp:12:11: warning: right operand of comma operator has no effect [-Wunused-value] g>>a,b; ^ main.cpp:19:21: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized] for(int j=b/2;j>=2;j--) ^ main.cpp:25:13: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized] if(x==y) ^~ main.cpp:27:21: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized] o<<x; ^