Introduction to Software Engineering 2017年9月27日 作业2

Homework

作业1 进制转换

① 1分12秒 = （72000）毫秒
② （7A）13 = （101）10
③ （7A）16 = （122）10
④ （7A）16 = （1111010）2 = （172）8
⑤ （1011011）2 = （133）8 = （5B）16
⑥ （678）10 = （1010100110）2 = （1246）8
⑦ （111）2 + （101）2 = （1100）2

作业2 something from wiki

1) Information

Information is that which informs. In other words, it is the answer to a question of some kind. It is thus related to data and knowledge, as data represents values attributed to parameters, and knowledge signifies understanding of real things or abstract concepts.

2) Positional notation

Positional notation or place-value notation is a method of representing or encoding numbers.

3) Algorithm

In mathematics and computer science, an algorithm (/ˈælɡərɪðəm/ (About this sound listen) AL-gə-ridh-əm) is an unambiguous specification of how to solve a class of problems

4) Software bug

A software bug is an error, flaw, failure or fault in a computer program or system that causes it to produce an incorrect or unexpected result, or to behave in unintended ways.

作业3 English words

1)十进制 ——————> Decimal system
2)二进制 ——————> Binary system
3)八进制 ——————> Octal number system
4)十六进制 —————> Hexadecimal

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