c语言静态函数调用静态变量_C语言中的静态变量和函数

c语言静态函数调用静态变量

C中的静态变量 (Static Variables in C)

Basically, when static variables are declared, they create only a single copy of them and are also termed as Class Variables.

基本上，声明静态变量时，它们仅创建它们的单个副本 ，也称为类变量 。

They retain the value assigned in the corresponding scope and do not initialize the variables again in the new scope of it.

它们保留在相应范围内分配的值，并且不会在其新范围内再次初始化变量。

Static variables remain in the memory space during the execution of the code.静态变量在代码执行期间保留在内存空间中。
The default value of the initialization of the Static variable is zero (0).静态变量初始化的默认值为零（0）。
In C programming, it is mandatory for the static variables to be initialized using the constant literal else it returns an error.在C编程中，必须使用常量常量初始化静态变量，否则它将返回错误。

Syntax:

句法：


static Data_Type variable = value;

Example:

例：


#include<stdio.h>
void implement()
{ int x = 0;
static int counter = 0;
counter++;
x++;
printf("\nStatic Variable's value:\n");
printf("%d",counter);
printf("\nLocal Variable's value:\n");
printf("%d",x);
} int main()
{
implement();
implement();
return 0;
}

In the above code snippet, the value of the local variable gets initialized again after every function call.

在上面的代码片段中，每次调用函数后，都会再次初始化局部变量的值。

Unlike the local variable (x), the static variable (counter) was initialized only once and it did retain the same copy of variable throughout the execution of the program.

与局部变量（x）不同，静态变量（counter）仅初始化一次，并且在程序执行期间确实保留了相同的变量副本。

Output:

输出：


Static Variable's value:
1
Local Variable's value:
1
Static Variable's value:
2
Local Variable's value:
1

C中的静态函数 (Static Functions in C)

Static functions in C basically restrict the scope of the method to the corresponding file. These functions can also be called without having the object initialized.

C语言中的静态函数基本上将方法的范围限制为相应的文件 。也可以在不初始化对象的情况下调用这些函数。

Static functions usually enhance the usability of the code i.e. makes the code ready to be reused again.静态函数通常会增强代码的可用性，即使代码准备好再次使用。
It limits the visibility of the scope of the function within that particular program.它限制了该特定程序内功能范围的可见性。

Syntax:

句法：


static Return_Type method_name(parameters)
{body;
}

Example:

例：


#include <stdio.h>//static function definition
static int sum(int a, int b){return (a+b);
}int main()
{int number1,number2;;printf("Enter the number1: ");scanf("%d",&number1);printf("Enter the number2: ");scanf("%d",&number2);printf("Addition of two numbers = ");int res = sum(number1,number2);printf("%d",res);return 0;
}

Output:

输出：


Enter the number1: 10
Enter the number2: 20
Addition of two numbers = 30

结论 (Conclusion)

Thus, in this article, we have understood the importance and behavior of static variables and static functions in the C programming language.

因此，在本文中，我们已经了解了C编程语言中静态变量和静态函数的重要性和行为。

翻译自: https://www.journaldev.com/35163/static-variables-functions-in-c

c语言静态函数调用静态变量