Question

我想输入类似＆＃34; g 1 2 3＆＃34;重复并在每次输入时将数字添加到变量中。我做了一个测试程序，但输出是错误的，例如如果我输入＆＃34; g 1 2 3＆＃34; 3次我希望我的变量打印＆＃34; 3＆＃34;但它打印＆＃34; 0＆＃34;。我的代码出了什么问题？

AddTot = int(0)
NameMarks = input("Please input your name followed by your marks seperated by spaces ")
NameMSplit = NameMarks.split()
while NameMarks != 'Q':
    Name1 = int(NameMSplit[1])
    Name2 = int(NameMSplit[2])
    Name3 = int(NameMSplit[3])
    AddTot + Name1
    NameMarks = input("Please input your name followed by your marks seperated by spaces ")
print(AddTot)

Answer 1

AddTot + Name1 不修改AddTot，因为结果不会存储在任何地方。替换为

AddTot += Name1 # same as `AddTot = AddTot + Name1`

那就是说，你的程序只使用第一个输入。要解决此问题，请在循环体内移动NameMSplit = NameMarks.split()：

AddTot = int(0)
NameMarks = input("Please input your name followed by your marks seperated by spaces ")
while NameMarks != 'Q':
    NameMSplit = NameMarks.split() # here
    Name1 = int(NameMSplit[1])
    Name2 = int(NameMSplit[2])
    Name3 = int(NameMSplit[3])
    AddTot += Name1
    NameMarks = input("Please input your name followed by your marks seperated by spaces ")
print(AddTot)

至于进一步的改进，您可以稍微缩短代码：

AddTot = 0 # or int() without argument
say = "Please input your name followed by your marks seperated by spaces "
NameMarks = input(say)
while NameMarks != 'Q':
    marks = [int(x) for x in NameMarks.split()[1:]]
    AddTot += marks[0]
    NameMarks = input(say)

print(AddTot)

如何从Python中的多个输入添加输入

1 个答案: