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
    A = L.point_b.y - L.point_a.y
    B = L.point_a.x - L.point_b.x
    C = L.point_b.x * L.point_a.y - L.point_a.x * L.point_b.y
    d = abs(A * P.x + B * P.y + C) / (A ** 2 + B ** 2) ** 0.5
    return d
    # pass


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()