Question

我必须编写一个程序来接收输入并写出输入的数字以及它的等级。我的程序工作，但显然我只应该使用局部变量。我需要更改什么，以便它只是局部变量？下面的两个变量是我目前用作全局变量的变量。

# This program takes intger inputs and provides a grade value for each number entered

number = 1
myNumbers = []

print("Please enter as many integer numbers as you would like. Enter -999 to exit loop")
# This function has the user input values and exit with a sentinel value -999
def getScores(number):
    sentinelValue = -999

    while(number != sentinelValue):
        number = eval(input("Enter an integer: "))

        if number > -1:
             myNumbers.append(number)

    print("Numbers entered: ")
    print(myNumbers, "\n")


# This function prints out the values with the appropriate letter grade
def printScores():

    print("Length of array = ", len(myNumbers))

    for i in range(0, len(myNumbers)):

        if myNumbers[i] >= 90:
            print(myNumbers[i], "is an A")
        if myNumbers[i] >= 80 and myNumbers[i] < 90:
            print(myNumbers[i], "is a B")
        if myNumbers[i] >= 70 and myNumbers[i] < 80:
            print(myNumbers[i], "is a C")
        if myNumbers[i] >= 60 and myNumbers[i] < 70:
            print(myNumbers[i], "is a D")
        if myNumbers[i] >= 0 and myNumbers[i] < 60:
            print(myNumbers[i], "is an F")
# The main function is where we will call the other functions and print out the results
def main():

    getScores(number)
    printScores()

# Call the main
main()

我仍然应该有两个独立的功能。

Answer 1

getScores在输入时不需要数字......它只能在循环之前创建一个默认值。它可以返回它创建的列表，而不是编写全局变量。调用者会记住该返回值并在下次调用中使用它。

# This program takes intger inputs and provides a grade value for each number entered

print("Please enter as many integer numbers as you would like. Enter -999 to exit loop")
# This function has the user input values and exit with a sentinel value -999
def getScores():
    sentinelValue = -999
    number = ''
    myNumbers = []
    while(number != sentinelValue):
        number = eval(input("Enter an integer: "))

        if number > -1:
             myNumbers.append(number)

    print("Numbers entered: ")
    print(myNumbers, "\n")
    return myNumbers

# This function prints out the values with the appropriate letter grade
def printScores(myNumbers):

    print("Length of array = ", len(myNumbers))
    # omit the rest for brevity...

# The main function is where we will call the other functions and print out the results
def main():
    scores = getScores()
    printScores(scores)

# Call the main
main()

如何在没有全局变量的情况下编写它？

1 个答案: