1. If you want to understand English, the help files of the English compiler system are all in English, but you don't need CET-4. If you can't, you can look it up in the dictionary.

2. Know mathematics, because the algorithms with good mathematical foundation are easier to understand, and many algorithms are based on mathematical principles. The university level is better, but there are many programming skills in high school.

3. If you want to know these things, you have to know some basic operations of computer simulation.

It is possible to be indifferent, and you can learn by yourself.

5. No, there are VB fortran and other languages, but now the most used language is C c++ JAVA, depending on your position.

6. First find a basic textbook, understand the basic grammar, and do more work of programming your own small programs. The textbook we use is Tan Haoqiang's C language programming, which is very suitable for getting started.