Question

例如，水（H2O）的分子量为：2（1.00794）+ 15.9994 = 18 代码：

formula = int(input("Enter the number of elements: "))
for i in range(formula):
    element = input("enter your element: ")
    molCount = float(input("enter the molecule count: "))
    print(molCount)
    atomWeight = float(input("enter the atomic weight: "))
    print(atomWeight)
    total = molCount*atomWeight
print(total)
total = total + total
print(total)

需要帮助才能将多个元素添加到一起......

Answer 1

线路上有一个错误： total = molCount*atomWeight

你的意思可能是total += molCount*atomWeight。

Answer 2

首先，在for循环之前定义total。其次，我认为你的等式需要

total += (molCount * atomWeight)

而不是原件。编辑代码：

formula = int(input("Enter the number of elements: "))
total = 0
for i in range(formula):
    molCount = int(input("Enter the molecule count: "))
    print("Molecule count: " + str(molCount))
    atomWeight = float(input("Enter the atomic weight: "))
    print("Atomic Weight: " + str(atomWeight))
    total += (molCount * atomWeight)
print(total)

蟒蛇|重复增加要素

2 个答案: