STL——array

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参考CPP标准文档

Arrays are fixed-size sequence containers.

c++11 中的array是固定大小的的线性序列容器

特点：

1. 他是严格的序列化排序的线性容器。

2. 连续存储的。

3. 大小固定，不能动态拓展。

array 使用构造函数和析构函数管理空间，容器大小是编译时常量。没有空间和时间开销。。所以没有。push_back, pop_back等成员函数。

初始化方法

array<int, 5> myArray;myArray.fill(0);array<int, 5> myArray2 = {1,2,3,4,5};array<int, 5> myArray3;for (int i = 0; i < 5; i++){myArray3[i] = i;}

std::array::swap

交换两个array条件是必须有相同的类型和容器大小

array的关系运算符操作

#include <iostream>#include <array>int main (){  std::array<int,5> a = {10, 20, 30, 40, 50};  std::array<int,5> b = {10, 20, 30, 40, 50};  std::array<int,5> c = {50, 40, 30, 20, 10};  if (a==b) std::cout << "a and b are equal\n";  if (b!=c) std::cout << "b and c are not equal\n";  if (b<c) std::cout << "b is less than c\n";  if (c>b) std::cout << "c is greater than b\n";  if (a<=b) std::cout << "a is less than or equal to b\n";  if (a>=b) std::cout << "a is greater than or equal to b\n";  return 0;}

Output:

a and b are equalb and c are not equalb is less than cc is greater than ba is less than or equal to ba is greater than or equal to b

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