docker自定义参数_参数定义

港控/mmm° 2022-12-06 15:42 222阅读 0赞

docker自定义参数

Parameters identify values that are passed into a [function][]. For example, a function to add three numbers might have three parameters. A function has a name, and it can be called from other points of a program. When that happens, the information passed is called an argument. Modern programming languages typically allow functions to have several parameters.

参数标识传递给[函数的值][function] 。 例如，一个将三个数字相加的函数可能具有三个参数。 函数具有名称，可以从程序的其他位置调用它。 发生这种情况时，传递的信息称为参数。 现代编程语言通常允许函数具有多个参数。

## 功能参数 **(** Function Parameters **)** ##

Each function parameter has a type followed by an identifier, and each parameter is separated from the next parameter by a comma. The parameters pass arguments to the function. When a program calls a function, all the parameters are variables. The value of each of the resulting arguments is copied into its matching parameter in a process call *pass by value*. The program uses parameters and returned values to create functions that take data as input, make a calculation with it and return the value to the caller.

每个函数参数都有一个类型，后跟一个标识符，并且每个参数与下一个参数之间用逗号分隔。 参数将参数传递给函数。 当程序调用函数时，所有参数都是变量。 每个结果参数的值在*按值传递*的过程调用中被复制到其匹配参数中。 该程序使用参数和返回值来创建函数，这些函数将数据作为输入，使用它进行计算，然后将该值返回给调用方。

## 函数和参数之间的区别 **(** The Difference Between Functions and Arguments **)** ##

The terms parameter and argument are sometimes used interchangeably. However, parameter refers to the type and identifier, and arguments are the values passed to the function. In the following C++ example, *int a* and *int b* are parameters, while *5* and *3* are the arguments passed to the function.

术语参数和自变量有时可以互换使用。 但是，参数是指类型和标识符，而参数是传递给函数的值。 在下面的C ++示例中， *int a*和*int b*是参数，而*5*和*3*是传递给函数的参数。

**`int addition (int a, int b){  int r;  r=a+b;  return r;}`**

**`int addition (int a, int b){ int r; r=a+b; return r;}`**

int main (){  int z;  z = addition (5,3);  cout << "The result is " << z;}

## 使用参数值 **(** Value of Using Parameters **)** ##

*  Parameters allow a function to perform tasks without knowing the specific input values ahead of time.
    
    参数允许函数执行任务而无需提前知道特定的输入值。
 *  Parameters are indispensable components of functions, which programmers use to divide their code into logical blocks.
    
    参数是功能中必不可少的组成部分，程序员可将参数用于将其代码划分为逻辑块。

> 翻译自: [https://www.thoughtco.com/definition-of-parameters-958124][https_www.thoughtco.com_definition-of-parameters-958124]

docker自定义参数

[function]: https://www.thoughtco.com/definition-of-void-958182
[https_www.thoughtco.com_definition-of-parameters-958124]: https://www.thoughtco.com/definition-of-parameters-958124