classAverage.py源代码分析
<script>function StorePage(){d=document;t=d.selection?(d.selection.type!='None'?d.selection.createRange().text:''):(d.getSelection?d.getSelection():'');void(keyit=window.open('http://www.365key.com/storeit.aspx?t='+escape(d.title)+'&u='+escape(d.location.href)+'&c='+escape(t),'keyit','scrollbars=no,width=475,height=575,left=75,top=20,status=no,resizable=yes'));keyit.focus();}</script># initialization phase
total = 0 # sum of grades
gradeCounter = 0# number of grades entered
# processing phase
grade = raw_input( "Enter grade, -1 to end: " )# get one grade
grade = int( grade )# convert string to an integer
while grade != -1:
total = total + grade
%获取分数的总和
gradeCounter = gradeCounter + 1
%分数的个数
grade = raw_input( "Enter grade, -1 to end: " )
%获取分数的输入
grade = int( grade )
%将string型转化为int型
# termination phase
if gradeCounter != 0:
average = float( total ) / gradeCounter
%获取平均值
print "Class average is", average
%打印平均值
else:
print "No grades were entered"
%否则提示错误
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