Compilare: main.cpp: In function 'bool vizuini(int, int)': main.cpp:31:38: warning: left operand of comma operator has no effect [-Wunused-value] for (int l = A.x, i=A.y, j=A.y; l<=x, i>=D.y, j<=B.y; l++, i--, j++) ~^~~ main.cpp:31:44: warning: right operand of comma operator has no effect [-Wunused-value] for (int l = A.x, i=A.y, j=A.y; l<=x, i>=D.y, j<=B.y; l++, i--, j++) ~^~~~~ main.cpp:38:42: warning: left operand of comma operator has no effect [-Wunused-value] for (int l = C.x, i = C.y, j = C.y; l>x, i>D.y, j<B.y; l--, i--, j++) ~^~ main.cpp:38:47: warning: right operand of comma operator has no effect [-Wunused-value] for (int l = C.x, i = C.y, j = C.y; l>x, i>D.y, j<B.y; l--, i--, j++) ~^~~~