什么是一个电脑病毒？

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A computer virus is a line of code that makes a program that can do malicious things to your computer or information on that computer. They can spread out quickly from one computer to another. There are multiple types of computer viruses. The most dangerous and quickly spread viruses are worms, trojans, and macro viruses.
Computer viruses use many types of computer language. Such as:

1. C
2. C++
3. Html
4. Java
5. Javascript
6. BASIC
7. Python

The ones listed on the top, C and C++ are the most complicated to write for a virus, but they can do heavy damage if the computer virus works.