Python GPA 计算器

Question

我正在使用 python 2 开发 GPA 计算器。但是，我无法让代码按我的意愿工作。我希望有人能帮我出来，给我一些方向。当我输入成绩时，我希望它计算 GPA。现在，它只读取一个字母或一个符号，但不能同时读取。我会输入 A+，它会给我 0.3 而不是 4.3。如果我输入多个等级，它只会读取一年级。 for 部分取所有输入的成绩，并给出我们的平均 GPA。

代码如下：

from sys import argv

def gp(grade):
    points = 0
    if grade == 'A' or grade == 'a':
        points +=  4.0
    if grade == 'B' or grade == 'b':
        points += 3.0
    if grade == 'C' or grade == 'c':
        points += 2.0
    if grade =='D' or grade == 'd':
        points += 1.0
    if grade == 'F' or  grade =='f':
        points += 0.0
    if grade.endswith ('+'):
        points = points + 0.3
    if grade.endswith ('-'):
        points = points - 0.3
    for x in grade
        return points = sum(points)/len(grade)

if __name__ == '__main__':
    grade = argv[1].replace(" ","")
    print (("%.1f") % gp(grade))

Answer 1

由于这看起来像家庭作业，我不会给出解决方案。但我会提供更多关于什么是错误的信息。希望如果您了解问题所在，您将能够弄清楚如何正确处理。

如果你的成绩是'A+'，那么它是一个由2个字符组成的字符串，第一个是A，第二个是+。 grade=='A' 可以是真的吗？一旦您理解了这一点，您就应该清楚为什么 A+ 没有获得第 4 部分的成绩。

至于为什么只给你一年级的结果，argv[1]变成了什么？是你发给它的所有成绩吗？

Answer 2

from sys import argv

def gp(grade):
    points = 0
    if grade.lower() == 'a':
        points +=  4.0
    if grade.lower() == 'b':
        points += 3.0
    if grade.lower() == 'c':
        points += 2.0
    if grade.lower() == 'd':
        points += 1.0
    if grade.lower() =='f':
        points += 0.0
    if grade[:0] == "+"
        points = points + 0.3
    if grade[:0] == "-"
        points = points - 0.3
    for x in grade
        return points = sum(points)/len(grade)

if __name__ == '__main__':
    grade = argv[1].replace(" ","")
    print (("%.1f") % gp(grade))

我“修复”了成绩字母的 if 语句，但你在这里是为了符号所以在那里。

Answer 3

'''This is a simple GPA calculator I was able to put together. Hope this help'''

class GpaCalculator():
    '''Declare the variables'''
    count = 0
    hrs   = 0
    numberofclasses =0
    totalhours = 0
    totalPoints = 0.0
    gpa = 0.0
    '''Prompt the user for the number of classes taking'''
    numberofclasses = int(input("Enter number of  classes "))

    '''use for to loop '''
    for count in range(count, numberofclasses):
        '''This is to keep track of the number of classes (Optional)'''
        print("For class # ", count+1)

        '''Prompt user for number of number of credit hours per class'''
        hrs = int(input("Enter the credit hrs "))

        '''Prompt user to enter the letter grade'''
        grade = input("Enter the letter grade ")

        '''Use if statement to check the grade and increment points and total hours'''

        if grade == 'A' or grade == 'a':
            totalPoints = totalPoints + (hrs * 4)
            totalhours = totalhours + hrs
        elif grade == 'B' or grade == 'b':
            totalPoints += (hrs * 3.0)
            totalhours += hrs
        elif grade == 'C' or grade == 'c':
            totalPoints += (hrs * 2.0)
            totalhours += hrs
        elif grade == 'D' or grade == 'd':
            totalPoints += (hrs * 1.0)
            totalhours += hrs
            '''If not A,B, C, D then it must be F. You can write validation to check in other lettes'''
        else:
            totalPoints += (hrs * 0.0)
            totalhours += hrs
    '''Calculate GPA based on the total points and total hours'''
    gpa = totalPoints / totalhours
    print("Your GPA is :", gpa)

def main():
    gpa = GpaCalculator()

if __name__ == '__main__':main()