What Is Static Function In C++ With Examples?

 

Do you know what is Static Function in C++ programming language? Have you ever thought about the implementation process of static function in C++ programming language? Let us try to understand the briefly static function & then we will discuss the implementation process.

But before we learn about the Static Function in C++ programming language, we have to learn static keywords & static variables in C++ programming language. So, we will gather all the necessary information related to the static function in the C++ programming language. So, let’s start our topic.

As usual, we will try to understand the necessity & the implementation process of the static function in C++ programming language using one daily life example. We will find out the necessity of using a static variable in C++ programming language first. Then we will know about the static function in C++ programming language. Moreover, all the process is related to each other. If you are studying and stuck in your C++ Homework then you can use our C++ Homework Help Services.

Let us assume one daily life scenario.

 

Real Life Example:

 

Suppose, you have bought a nice bookshelf. As you have a lot of books, you need to place all of those in a sequence day by day. So, you started your task. And in a day, you have managed to set 20 pieces of books there. So, you left the job at that point & wait for the next day. The next day, you find out that your little sister completely messes with all the things. All the books are now kept outside of the bookshelf.

As an elder brother, you can’t able to rebuke your little sister much. So, what will you do at that point?

As you don’t have any other option, you need to resume your work from the beginning. At the end of the day, you told your mother to look after your bookshelf to avoid extra work in next day die to your sister. And in next day, you find your bookshelf similar you left. The Static function in C++ programming language works similarly. We will find it out more when we will implement it. 

Let us gather theoretical knowledge of the static function in the C++ programming language. And we will also try to find the similarity there with the above-stated example.

 

 

 

What Is C++ Programming Language? Read Below

 

Before we start writing about the Static Function in C++ programming language, we need to first clear the basic understanding of C++ programming language. C++ programming language is a highly used programming language. It is a programming language that is derived from one of the simplest programming languages that are C programming language. There is a high similarity between the C++ programming language & C programming language. That is the reason, C++ programming language is taught after getting knowledge about C programming language. Though, C++ programming language can’t be considered one of the simplest languages.

C++ programming language is considered an Object-Oriented Programming Language. It is a programming language that follows the rule of the OOPs concept. From that point of view, C++ programming language has also a similarity to Java programming language. So, C++ programming language can consider as a bridge between C programming language & Java programming language. All the necessary theories like Encapsulation, Inheritance, etc. belong to the C++ programming language. It is hoped that you have realized the importance of C++ programming language. Now, let’s move with our topic.

 

 

What Is Static In C++ Programming Language?

 

Moreover static is a keyword in the C++ programming language. As a keyword, the static can be placed before any objective in the C++ programming language. Like, it is a keyword that can be placed before a variable or a function. If the keyword is before the variable, it will be termed a Static Variable. If the keyword is placed before any function, then it will be considered a Static Function in C++ programming language. Let us try to understand both of them one by one.

• Static Variable: When the static keyword is used before any variable, the variable becomes a static variable. Its functionality will be different from others. For a simple variable, it becomes a null variable after closing the function. The variable will be removed from the memory space after the closing of any function to save the memory space. But in the case of static variables, the variable space still exists in the memory after the closing of the function. It will help to implement some serious difficult issues. We will learn more about it when we implement one of these.
• Static Function: Static function in C++ programming language is derived from the concept of the static variable. If the static keyword is used before the function name, it becomes a static function. We used to write these things in Java programming language. But here, we need to intentionally declare a static function. The static function in C++ programming language can only able to access the static variables or other static functions declared under that said function. If the static function in C++ programming language, try to access any non-static variable or function, then there will be some errors. The static function in C++ programming language creates a copy of the member function to the other number of class objects.
• Static Variable Along Function: Now, this can be considered the third category. Static functions in C++ programming language can also be defined into this category. Though, there is the least use of this category. But still, it is a valuable one. It is a combination of both categories mentioned above. Here a static variable is developed. But it should work along with a function under a separate class. That static variable can be used outside of that class. But while using that variable, the function declared under the class will also be used. So, one is dependent upon another. It will be easily understood when we provide one example.

Now, all categories where the static keyword is used are listed above. You might be getting confusion related to all the categories mentioned above. But there is no need to have worried. We are here to clear all the doubts. Yo will know more about them when we implement those using simple codes. We will implement the examples to clear the confusion related to it. Now, let us move forward to know static function in C++ programming language.

 

Implementation Of Static Variable In C++ Programming Language:

 

The implementation process of a static variable in C++ programming language is moreover simple. Here, we need to first declare one function. It will be a simple function to work. Under that function, we will declare one variable as a static one. We need to use a static keyword before the declaration of the variable. Then we have provided a value to it. Now, we are just increasing the variable with 1 & then we are printing it.

Now, in the main function, we need to declare one loop. That might be any loop as per your choice. Here, we have declared one while loop. The loop is calling the function for a certain amount of time. In normal cases, the variable declared under the function will print only the provided value. But in this case, as the variable is a static one, it will print the sequence of numbers. Here, the increment of the variable works as it is a static one.

General Syntax: Static data-type variable-name;

 

Example:

 

#include <iostream> #include <string> using namespace std;

void codingzap(){ static int zap = 0; // Static Variable Declaration

zap++; // Increment Of Variable

cout << zap << " ";} // Printing Data Of The Static Variable

int main(){int i=0; while(i<5){ // While Loop Implementation

codingzap(); // Calling The Function

i++;}
return 0;}

Let us try to find out the output of the above code. It will help to understand the static variable in the C++ programming language.

 

Output:

 

 

Implementation Of Static Function In C++ Programming Language:

 

Now, as we know the implementation process of a static variable in C++ programming language, it will be an easy task to implement the static function in C++ programming language. The implementation process of static function in C++ programming language is very easy. One more operator needs to be used in this case. We will know more about it. But let’s start implementing the static function in the C++ programming language.

For the implementation of the Static function in C++ programming language, we need to declare one class first. It is a simple class declaration. In C++ programming language, we used to declare such a class many times. So, there is no new thing for declaring for this class. Under that class, we need to declare one function. That function will be the static function in the C++ programming language. Before the function name, we need to prove the static keyword. Under that function, we can write any statement. Like here, we are printing one message. Now, we need to conclude the class there. Then we need to proceed to the main function. if you are also interested in learning a concept in Python, you must read this article on “How to delete a variable in Python“

It is time to define the main function. In the main function, we will directly call the static function. Hence, it will execute all the statements mentioned there. We need to use the “::” operator to call the function. The operator should be used properly. The general syntax is provided for help. Using the class name & the function name, we can call the function.

General Syntax: class-name::function-name();

 

Example:

 

#include<iostream> using namespace std;

class zap{ // Class Declaration

public:

static void print(){ // Static Function

cout<<"Welcome To CodingZap";}};  // Statement Provided In Function

int main(){ zap::print(); // Calling Static Function

return 0;}

Let us try to find out the output of the above code. It will help to understand the static function in the C++ programming language.

 

Output:

 

Implementation Of Static Function In C++ Programming Language:

 

We have mostly completed our topic. But it is not finished yet. Without mentioning this category, the topic can’t be concluded. Though, this category is rarely used in the C++ programming language. But still, it holds importance. The category is highly relatable to the previous categories. The static function in the C++ programming language is implemented here in a different way. Let us try to find out the process with a simple code.

Here, we need to first declare a class. This is a similar approach to what we have done in the previous step. This is also a simple class declaration process. It is the process that is followed most of the time. Under the class, we need to declare two things. First, we need to declare one static variable. The method to declare a static variable is mentioned in the first category. We need to use the same approach. Now, we need to declare the second operation.

We need to also declare one function. It is the function that is used to do other operations in that class. Like here, we have written one statement under that function. If you need, you can also write some difficult operations there. Now, our task under the class is completed. We should close the class structure & move forward. We need to remember that the class name & the function name should be the same.

Outside of the class, we need to provide value to the static variable using the “::” operator. The first one will be the class name or the function name. And the second one will be the variable name. Then we need to provide the value to it. Now, in the main function, we need to declare an object of the class. Then we print the static variable using that object value. The function under the class will be executed first. And then, the variable value will be printed.

 

Example:

 

#include<iostream> 

using namespace std; 

class Zap{ // Class Declaration

public:

static int One; // Static Variable Declaration

void Zap(){ // Normal Function Declaration

cout<< "Hello ZapOne\n";};}; // Random Statement Provided

int Zap::One = 21; // Static Variable Value Assigning

int main(){ 

Zap Coding; // Object Of Class

cout << "Output Is: " << Coding.One; // Printing The Value Of Static Variable

return 0;}

Let us try to find out the output of the above code. It will help to understand the static function in the C++ programming language.

 

Output:

 

Conclusion:

 

As we saw, the static function in C++ programming language is an important topic.

We need to know the difference between the static variable & the static function in C++ programming language. The second category is known as the implementation process of static functions in the C++ programming language. Other categories are used for background purposes.

It is advisable to clear the basic concept of the C++ programming language. Otherwise, there will be a knowledge gap. The implementation process of class & syntax writing of C++ programming language needs to be followed up.  It will help to know this topic in an easy & better process. It will help us in the future.

So, hope you have liked this piece of article. Share your thoughts in the comments section and let us know if we can improve more.

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