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This article mainly explains "what is the effective way to prevent bedbugs in software development". The content of the explanation in this article is simple and clear, and it is easy to learn and understand. let's study and learn "what is an effective way to prevent bedbugs in software development"!

It seems perfectly normal to have Bug in software development. As a software development engineer, who dares to say that the code he wrote did not appear Bug. Some programmers even laugh at themselves that their development work is writing Bug. Therefore, it is too normal to have bug in software development. But have you ever considered how to prevent Bug in software development?

We know that the earlier the Bug discovers, the lower the cost, and the later the discovery, the higher the cost. It is estimated that many people do not have this experience, and many people have this experience. This is not very obvious for small-scale code, but it is obvious for large-scale, complex software. Because in the case of a very large amount of code, it is not easy to catch a Bug.

Example

Forget the large-scale code, let's take a look at the following code. Print_gender in this code is used to print gender strings based on parameters. But in the actual use, it is found that the print is always man, but can not print woman, can you see what the problem is?

There is less code now, and it is estimated that many people can see it at once. However, it is difficult to find similar errors in a very large function.

Did you see that?

Yes, the condition in the if statement in the function is miswritten. In fact, this is a very low-level and easy-to-make mistake. When we hit the keyboard quickly, we probably missed an equal sign and produced this result.

If (is_male = true)

How to find the problem as soon as possible

Of course, it's best to find problems as soon as possible, but when can you arrive early? How to find the problem as soon as possible?

The earliest point in time should be when the compiler compiles. When we write code, there are often situations where the compiler cannot pass. If we can solve the errors of the program at this stage, then it is naturally very good, but it is impossible to solve all of them at this stage. We can try our best to solve the problem at this stage.

For example, the previous error can be solved with the help of the compiler during the compilation phase. Smart, do you know how to do it?

We can write the above if statement as follows:

If (true = is_male)

That is, write the constant to the front and the variable to the back. In this way, a compilation error occurs in the absence of an equal sign. Because we can't assign a constant. It can be compiled if there is no lack of equal sign.

Here is just an example, we can use compilers to improve the quality of our code in many places, and avoid logic errors at a later stage. Let me give you another example.

Const is a frequently used keyword in C _ const +, such as the following store_name function. We originally intended to store the passed parameters in a temporary variable in the function and then analyze it later. But because of carelessness, the parameters of strcpy are reversed. If the const keyword is used in the parameter, it can be used as a precaution to avoid errors.

It can be seen that the software Bug caused by low-level errors in development can be effectively avoided in this way. And because the problem will be discovered earlier, the cost of the whole repair will be much lower.

Thank you for your reading. the above is the content of "what are the effective methods to prevent bedbugs in software development". After the study of this article, I believe you have a deeper understanding of what is an effective way to prevent bedbugs in software development, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!

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