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How to improve the readability of C language code through good identifier naming?
How to improve the readability of C language code through good identifier naming?
Apr 03, 2025 pm 12:24 PM
Improve the readability of C code through clear and easy-to-understand naming. The specific steps include: using descriptive variable names to accurately reflect the data content. The variable names are organized using camel nomenclature or underscore nomenclature. Use descriptive function names to clearly represent function functions. Continuously learn and practice good naming habits and read more excellent codes.
How to improve the readability of C language code? By naming! This is not a joke. A programmer's skills are largely reflected in his taste in writing code, and naming is the most direct reflection of this taste. Bad code is the same, and good code has its own advantages, but good code cannot escape one thing in common: it is clear and easy to understand. And naming is the first step to be clear and easy to understand.
Many novice programmers, even some old birds, like to use some short and confusing variable names, such as i , j , k , a , b , c , and even x , y , z . This may still be acceptable in short code snippets, but once the code size becomes larger, these mysterious letter combinations will put you in endless debugging hell. Just imagine, when you face hundreds of lines of code and see an i , how much time do you have to trace back what it actually represents? I believe many people have deeply experienced this kind of pain.
So, instead of wasting time in debugging, it is better to name it clearly from the beginning. A good variable name should be able to accurately describe the data it represents. For example, instead of using i to represent a loop counter, it is better to use loopCounter ; instead of using a to represent the student's age, it is better to use studentAge . This seems to be just a few more letters, but the benefits are huge. This not only improves the readability of the code, but also lays a solid foundation for future maintenance and expansion.
Of course, the longer the naming, the better. Too long variable names will affect the readability of the code, making people feel redundant and cumbersome. We need to find a balance point, which not only ensures the clearness of the variable name, but also avoids being too long. Some commonly used naming specifications, such as camelCase or underscore nomenclature (snake_case), can help us better organize variable names.
Let’s give another example, suppose we write a program to calculate the volume of a cylinder. A bad way of naming might be:
<code class="c">#include <stdio.h> int main() { float r, h, v; scanf("%f %f", &r, &h); v = 3.14159 * r * r * h; printf("%f\n", v); return 0; }</stdio.h></code>
This code can run, but it is extremely readable. Improved version:
<code class="c">#include <stdio.h> int main() { float radius, height, volume; printf("請輸入圓柱體的半徑和高度："); scanf("%f %f", &radius, &height); volume = 3.14159 * radius * radius * height; printf("圓柱體的體積為：%.2f\n", volume); return 0; }</stdio.h></code>
Is it much clearer in an instant? Naming of radius , height , volume directly tells us the meaning of variables, and there is no need to make any effort to guess.
In addition to variable names, function names are equally important. A good function name should accurately describe the function's function. For example, instead of naming a function with func1 , it is better to use calculateCylinderVolume . This not only improves the readability of the code, but also facilitates the maintenance and reuse of the code.
Finally, I want to emphasize that good naming habits cannot be achieved overnight and require continuous learning and practice. Read more excellent code, learn how excellent programmers name them, and gradually develop good naming habits. This will be an important milestone on your way to becoming a programming giant. Remember, the code is written for people to see, and the second is executed for machines. Make your code elegant and make your code speak!
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