![](https://img.laitimes.com/img/_0nNw4CM6IyYiwiM6ICdiwiI0NXYFhGd192UvwVe0lmdhJ3ZvwFM38CXlZHbvN3cpR2Lc1TPB10QGtWUCpEMJ9CXsxWam9CXwADNvwVZ6l2c052bm9CXUJDT1wkNhVzLcRnbvZ2LcVTOtlVdsdUZ1x2RiZXUYpVd1kmYr50MZV3YyI2cKJDT29GRjBjUIF2LcRHelR3LcJzLctmch1mclRXY39jMzgTNyUjM0ETOwkDM0EDMy8CX0Vmbu4GZzNmLn9Gbi1yZtl2Lc9CX6MHc0RHaiojIsJye.jpg)
var area:int = 0;
pt = startPt;
do
{
var _x:int = pt.x;
pt = nextPt;
area += pt.y * (pt.x - _x);
}while(pt.x != startPt.x || pt.y != startPt.y)
var area:int = 0;
pt = startPt;
do
{
var _x:int = pt.x;
pt = nextPt;
area += pt.y * (pt.x - _x);
}while(pt.x != startPt.x || pt.y != startPt.y)