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标题: 英文作业：对字符串进行处理实现两个数正整数相加 [打印本页]

作者: java无忧网 时间: 2018-11-23 11:20
标题: 英文作业：对字符串进行处理实现两个数正整数相加

Assignment #9

Goals:

Ø This lab gives students more experience in

· Top-down design.

· Procedural abstraction using methods.

· Good style programming.

Requirement

Write a structured program that can accept two integer numbers up to 40 digits and perform the followings:

1. Add the two numbers and display the result.

2. The result number should be separated by commas.
For example

If inputs are:

Number1: 236598745632

Number2: 2453254365546764765

The output should be:

236,598,745,632 +

2,453,254,365,546,764,765

-------------------------------------

2,453,254,602,145,510,397

Notes:

· You must read the two input numbers as string objects, then verify if the input is correct (i.e. all digit characters).

· You may assume that your program only works for positive integer numbers.

· You cannot use any of BigDecimal / BigInteger / double / long / int types for your calculations.

Marking Scheme

[2 marks] Presentation/Style: Organization, readability, descriptive identifier,

indentation, bracket placement

[14 marks] Correctness: Program works without bugs. Appropriate use of

methods.

[4 marks] Internal Documentation and External document (Provide pseudo code
for the method which adds the two String umbers)

运行效果：

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