1.实例5.1 计算BMI的值
height, weight = eval(input("请输入身高(米)和体重值(公斤)并用逗号隔开:"))
bmi = weight / pow(height, 2)
print("BMI数值为: {:.2f}".format(bmi))
who, dom = " ", " "
if bmi < 18.5:
who = "偏瘦"
elif bmi < 25:
who = "正常"
elif bmi < 30:
who = "偏胖"
else:
who = "肥胖"
if bmi < 18.5:
dom = "偏瘦"
elif bmi < 24:
dom = "正常"
elif bmi < 28:
dom = "偏胖"
else:
dom = "肥胖"
print("BMI国际指标为:'{0}',国内指标为'{1}'".format(who, dom))
2.实例5.2 将两套BMI指数融合
height, weight = eval(input("请输入身高(米)和体重(公斤)[逗号隔开]: "))
bmi = weight / pow(height, 2)
print("BMI 数值为：{:.2f}".format(bmi))
who, dom = " " , " "
if bmi < 18.5:
who, dom = "偏瘦", "偏瘦"
elif 18.5 <= bmi < 24:
who, dom = "正常", "正常"
elif 24 <= bmi < 25:
who, dom = "正常", "偏胖"
elif 25 <= bmi < 28:
who, dom = "偏胖", "偏胖"
elif 28 <= bmi < 30:
who, dom = "偏胖", "肥胖"
else:
who, dom = "肥胖", "肥胖"
print("BMI 指标为:国际'{0}', 国内'{1}'".format(who, dom))
3.实例3.1 计算圆周率
'''
1、近似公式法
pi = 0
N = 100
for k in range(N) :
pi += 1/pow(16,k)*(
4/(8*k+1) – 2/(8*k+4) -
1/(8*k+5) – 1/(8*k+6))
print("圆周率值是: {}".format(pi))
'''
#2、蒙特卡罗方法
from random import random
from math import sqrt
from time import process_time
DARTS = 1000
hits = 0.0
process_time()
for i in range(1, DARTS+1):
x, y = random(), random()
dist = sqrt(x ** 2 + y ** 2)
if dist <= 1.0:
hits = hits + 1
pi = 4 * (hits / DARTS)
print("圆周率值是: {}".format(pi))
print("运行时间是: {:.5f}s".format(process_time()))
