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:11:6: warning: unused variable ‘comun’ [-Wunused-variable] int comun=0; ^