在Python

Question

我想學習Python有毛病我的計算，並作爲測試我試圖做一個BMI計算器

#BMI Calculator 

name = raw_input ("What is your name?: ") 
weight = raw_input ("Hello %s What is your weight? (kilo): "% (name)) 
height = raw_input ("And what is your height? (cm) ") 

#Calculations: weight/height^2 * 10000 

weight = int(weight) 
height = int(height) 

BMI = (weight/height ** 2) * 10000 

print "%s, your BMI is %s"% (name, BMI) 

但似乎有一些錯誤的計算，因爲我總是BMI爲0？怎麼了？

Answer 1

在Python和幾種語言中/是「整數除法」的運算符。例如，在Python中，嘗試：

num = 1/2 # Comes out to be 0 

相反，確保涉及您的除法計算中的一個號碼是float：

num = 1.0/2 # Comes out to be 0.5! 

在您的方案，因爲height和weight是整數，它意外地在做整數除法！

您也可以施放變量花車，像這樣：

weight_f = float(weight)