向变量中添加小数点后两位的数字（2.50）

Question

我该怎么加2.50元的费用？你知道吗

现在它只是把它打印成2。你知道吗

cost = 0.00

r = open("toppings.txt")

bases = ["small","medium","large"]

toppings = ["Pepperoni","Chicken","Cajun Chicken","Mushrooms",
            "Red Onions","Sweetcorn","Ham","Cheese","Spicy Minced Beef",
            "Anchovies","Tuna","Peppers","Jalapenos","Green Chillies"] #0-13

def small():

    current = cost + 2.50

    print("Your current total cost is " + "£" + str(int(current)))

Answer 1

您正在将此行中的浮动当前账单金额转换为int

print("Your current total cost is " + "£" + str(int(current)))

而是使用此命令打印当前账单金额。你知道吗

print("Your current total cost is " + "£" + "{0:.2f}".format(round(current,2)))

输出

Your current total cost is £5.50