将程序从QBasic转换为Python [英] Convert program from QBasic to Python

问题描述

我正在尝试转换我在Basic中制作的程序！ (iOS上为QBASIC)到Python.我正在慢慢地通过Python for Dummies工作，但是我仍然坚持如何转换FOR循环.有人可以帮忙吗?波纹管是QB代码.

Im trying to convert a program that I made in Basic! (QBASIC on iOS) to Python. I am slowly working my way through Python for Dummies but I am stuck on how to convert FOR loops. Can someone help? Bellow is the QB code.

REM Prime Numbers v2

REM Av 2.2 seconds for 1000
REM Av 5.3 seconds for 2000

INPUT "Prime numbers upto";limit
PRINT
t1 = TickCount
PRINT "2 3 ";
count = 2
FOR posprime = 3 TO limit STEP 2
    posfactor = 3
    prime = 1
    GOSUB testing
    IF prime = 1 THEN
        PRINT posprime " ";
        count = count + 1
    END IF
NEXT posprime
t2 = TickCount
PRINT
PRINT
PRINT count " prime numbers found"
PRINT USING "####.#"; "Completed in" t2 - t1 " seconds"
END

testing:
IF posprime/posfactor = INT(posprime/posfactor) THEN
    prime = 0
    RETURN
ELSE
    posfactor = posfactor + 2
    IF posfactor > SQR(posprime) THEN
        RETURN
    ELSE
        GOTO testing

这是我和儿子在Basic上编写的程序！ (适用于iOS的QBasic)，显示所有质数，直至用户输入的限制，并添加了一些跳过明显的非质数的添加部分.哦，它还包含一些速度检查，我们过去经常检查一下iPhone和iPad处理器之间的区别.

It is a program that me and my son made on Basic! (QBasic for iOS) that displays all the prime numbers up to the limit entered by the user with some added parts that skip obvious non-prime numbers. Oh and it includes a little speed check that we used to see the difference between iPhone and iPad processors.

推荐答案

FOR posprime = 3 TO limit STEP 2

上一行可以翻译为以下Python代码(不包括限制):

Above line could be translated into following Python code (limit exclusive):

for posprime in range(3, limit, 2):

http://docs.python.org/2/library/functions. html#range

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