Compilare: main.cpp: In function 'int main()': main.cpp:48:8: warning: left operand of comma operator has no effect [-Wunused-value] x, y; ^ main.cpp:48:9: warning: right operand of comma operator has no effect [-Wunused-value] x, y; ^ main.cpp:56:8: warning: left operand of comma operator has no effect [-Wunused-value] x, y; ^ main.cpp:56:9: warning: right operand of comma operator has no effect [-Wunused-value] x, y; ^ main.cpp:63:30: warning: 'y' may be used uninitialized in this function [-Wmaybe-uninitialized] fout << x << " " << y << " " << z; ^~~ main.cpp:63:18: warning: 'x' may be used uninitialized in this function [-Wmaybe-uninitialized] fout << x << " " << y << " " << z; ^~~