Compilare: user.cpp: In function ‘int main()’: user.cpp:24:26: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(tr[j].y1>=tr[i].y0 && tr[j].y1<=tr[i].y1 || tr[j].y0>=tr[i].y0 && tr[j].y0<=tr[i].y1) ^ user.cpp:25:27: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(tr[j].x0>=tr[i].x0 && tr[j].x0<=tr[i].x1 || tr[j].x1>=tr[i].x0 && tr[j].x1<=tr[i].x1) ^ user.cpp:40:21: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(tr[2].y1>=a.y0 && tr[2].y1<=a.y1 || tr[2].y0>=a.y0 && tr[2].y0<=a.y1) ^ user.cpp:41:23: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(tr[2].x0>=a.x0 && tr[2].x0<=a.x1 || tr[2].x1>=a.x0 && tr[2].x1<=a.x1) ^ user.cpp:11:6: warning: unused variable ‘comun’ [-Wunused-variable] int comun=0; ^