Illustrations of Employing the “typedef” Search phrase in C in Linux
Commonly, there are two most typical works by using of the “typedef” keyword in the C programming language. The 1st usage is with the pre-defined information styles. There are certain sophisticated pre-described information varieties this kind of as “unsigned int”. If you are likely to develop a number of variables of this details type inside your code, then it will get really inconvenient for you to type the title of this information style each time you attempt to produce these kinds of a variable in your code. To keep away from this trouble, you can develop a short identify or an alias of this details kind with the assistance of the “typedef” search term, and then you can use that alias during your code for variable declaration of this type.
The second use is with the buildings in the C programming language. A framework itself is a user-defined knowledge type. On the other hand, at times, the identify of your composition is so complex that it creates difficulty for you when you attempt to make an item of that structure. To solve this difficulty, you can shorten the real name of your construction by devising its alias with the assistance of the “typedef” key phrase, and then you can use that alias to develop the objects of the reported framework throughout your code.
Now, we will go by way of a couple illustrations that will make the principle of applying the “typedef” keyword in C even clearer.
Case in point 1: Employing the “typedef” Search term with Typical Info Styles in C
In this illustration, we will be utilizing the “typedef” keyword with the typical knowledge sorts in C. For that, we have published a sample C program, which is revealed in the adhering to graphic. In this code, we preferred to declare two variables of the “unsigned int” facts style. However, we do not will need to use this extensive declaration each individual time. As a result, we have to start with described an alias for this knowledge type with the “typedef” search phrase. We named this alias “uint”. This definition has the adhering to 3 sections: the “typedef” key phrase, the knowledge style whose alias you want to build, and the alias alone. Just after this definition, we have merely employed the alias “uint” for declaring two diverse variables “var1” and “var2” having the “unsigned int” data kind. Then, we have only printed the values of these variables on the terminal. From this code, you can very easily see how we shortened the name of a typical knowledge type by employing the “typedef” search phrase.
Following preserving this code, you can compile it with the command cited down below:
$ gcc typedef.c –o typedef
When this code is compiled properly, we can operate it employing the adhering to command:
The output of this code exhibits that there ended up no errors in our code, which indicates that we have successfully utilised the alias of the “unsigned int” details type that has served the intended purpose by generating use of the “typedef” keyword.
Example 2: Utilizing the “typedef” Search phrase with Composition in C
Apart from basically employing the “typedef” keyword with the ordinary info types, it can also be made use of to shorten the normal names of the constructions in the C programming language. In the C code that is shown in the impression under, we have defined a construction named “Student”. On the other hand, instead of using the typical framework definition in C, we have also said the “typedef” key word ahead of this definition. This is accomplished to build an alias for the “Student” framework. The alias that we have produced for this structure is “Stud”, which is composed immediately after the closing brackets of our structure, adopted by a semi-colon. In the system of this framework, we have some attributes these as “name”, “degree”, “university”, and “id”.
Right after building this framework, we have outlined the “main()” perform of our software. In the body of this function, we have first designed an object of our structure. You can easily see from our code that we have not used the regular identify of our composition, i.e., University student for producing its object fairly we have utilised its alias, i.e., Stud to build the object. Soon after developing the object “S”, we have made use of the “strcpy()” purpose of the C programming language (which is employed to copy one string to a different) to copy the preferred values to the string variables inside of our structure. However, the “id” can be assigned an integer price through the typical assignment technique. Lastly, we have printed all these values on the terminal.
This code can be quickly compiled and executed in the same fashion as we discussed in example #1. You can visualize its output in the appended graphic:
This post supplied a good head commence to the inexperienced persons for employing the “typedef” search phrase in the C programming language in Linux. Immediately after learning the essential use of this keyword, you can even build extra intricate applications with it.