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1.2 KiB
1.2 KiB
title, localeTitle
| title | localeTitle |
|---|---|
| C++ Arrays | C ++数组 |
什么是阵列？
数组是一系列相同数据类型的元素，它们存储在连续的内存位置，可以单独引用。
例如，包含5个称为数字的整数值的数组声明如下：
int numbers [5];
Initializiation：
//Initialization with entries:
int numbers [5] = {1, 2, 3, 4, 5};
//Initialization with no values:
int numbers [5] = {};
//Initialization with declaration:
int numbers [] = {1, 2, 3, 4, 5};
//Note that here the number of values defines the size of the array.
//In the examples above, the size was fixed beforehand
请注意 ，C ++中的数组在大小上是不可置换的，这意味着一旦声明了大小为5的数组，就无法将其放大或缩小。如果您确实需要具有相同条目的更大阵列，则必须将所有条目复制到更大尺寸的新阵列。
访问：
可以通过引用它们在数组中的位置来访问数组中的元素。 （从0开始计数）。
例：
x = numbers[0]; // = 1. [0] == first position
numbers[2] = 55; // Sets the third position (3) to the new number 55
//numbers[] is now: {1, 2, 55, 4, 5}