Compilare: user.cpp: In function ‘int main()’: user.cpp:36:60: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if((a[1].x<a[j].x&&a[j].x<a[i].x&&a[1].y<a[j].y&&a[j].y<a[i].y||a[1].x>a[j].x&&a[j].x>a[i].x&&a[1].y>a[j].y&&a[j].y>a[i].y)&&((a[1].x*a[i].y)+(a[i].x*a[j].y)+(a[1].y*a[j].x)-(a[j].x*a[i].y)-(a[j].y*a[1].x)-(a[1].y&a[i].x)==0)&&j!=i) ^