Python作业-实验一

def calculate_bmi():
    """
    从标准输入读取体重（kg）和身高（m），计算并打印 BMI 值，保留两位小数。
    """
    # 1. 读取输入
    try:
        weight_str, height_str = input("请输入体重(kg)和身高(m)，用空格隔开: ").split()
        weight = float(weight_str)
        height = float(height_str)
    except ValueError:
        print("输入格式错误，请输入有效的数字。")
        return
    except Exception as e:
        print(f"发生错误: {e}")
        return

    # 2. 校验输入
    if height <= 0:
        print("身高必须大于0。")
        return
    if weight <= 0:
        print("体重必须大于0。")
        return

    # 3. 计算 BMI
    bmi = weight / (height ** 2)

    # 4. 输出结果，保留两位小数
    print(f"您的BMI值为: {bmi:.2f}")

if __name__ == "__main__":
    calculate_bmi()

import random

# 生成一个0到1000之间的随机整数（包含0和1000）
random_number = random.randint(0, 1000)
print(f"生成的随机数是: {random_number}")

def calculate_hypotenuse():
    try:
        a_str, b_str = input("请输入两个直角边的长度，用空格隔开: ").split()
        a = float(a_str)
        b = float(b_str)
    except ValueError:
        print("输入格式错误，请输入有效的数字。")
        return
    except Exception as e:
        print(f"发生错误: {e}")
        return

    if a <= 0 or b <= 0:
        print("边长必须大于0。")
        return

    c = (a**2 + b**2)**0.5
    print(f"直角边a: {a:.1f}, 直角边b: {b:.1f}, 斜边c: {c:.1f}")

if __name__ == "__main__":
    calculate_hypotenuse()

import math

def sum_of_square_roots():
    try:
        a_str, b_str, c_str = input("请输入三个浮点数，用空格隔开: ").split()
        a = float(a_str)
        b = float(b_str)
        c = float(c_str)
    except ValueError:
        print("输入格式错误，请输入有效的数字。")
        return
    except Exception as e:
        print(f"发生错误: {e}")
        return

    if a < 0 or b < 0 or c < 0:
        print("输入数字不能为负，无法计算负数的平方根。")
        return

    s = math.sqrt(a) + math.sqrt(b) + math.sqrt(c)
    print(f"三个数的平方根之和为: {s:.2f}")

if __name__ == "__main__":
    sum_of_square_roots()

import math

def circle_properties():
    try:
        r_str = input("请输入圆的半径: ")
        r = float(r_str)
    except ValueError:
        print("输入格式错误，请输入有效的数字。")
        return
    except Exception as e:
        print(f"发生错误: {e}")
        return

    if r <= 0:
        print("半径必须大于0。")
        return

    area = math.pi * r * r
    circumference = 2 * math.pi * r
    print(f"圆的面积: {area:.2f}")
    print(f"圆的周长: {circumference:.2f}")

if __name__ == "__main__":
    circle_properties()

# 打印指定的祝福语
print("What a beautiful campus!")
print("I wish you every success!")