题解 | 点到直线距离

import math


class Point:
    def __init__(self, x, y):
        self.x = x
        self.y = y


class Line:
    def __init__(self, point_a, point_b):
        self.point_a = point_a
        self.point_b = point_b


def get_distance(P, L):
    # TODO: 计算点P到直线L的距离
    xb, xa, xp, ya, yb, yp = L.point_b.x, L.point_a.x, P.x, L.point_a.y, L.point_b.y, P.y
    return abs((xb - xa) * (ya - yp) - (xa - xp) * (yb - ya)) / ((xb - xa) ** 2 + (yb - ya) ** 2) ** 0.5


def main():
    a, b = map(int, input().split())
    sx, sy, tx, ty = map(int, input().split())

    point_a = Point(sx, sy)
    point_b = Point(tx, ty)
    point_c = Point(a, b)
    line = Line(point_a, point_b)

    print("{:.2f}".format(get_distance(point_c, line)))


if __name__ == "__main__":
    main()