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=P.x
    b=P.y
    A=L.point_b.y - L.point_a.y
    B=L.point_a.x - L.point_b.x
    C=L.point_a.y * L.point_b.x - L.point_b.y * L.point_a.x
    # 计算分子：|A*a + B*b + C|
    numerator = abs(A * a + B * b + C)
    # 计算分母：√(A² + B²)
    denominator = math.sqrt(A**2 + B**2)
    return numerator / denominator


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()