1.数组的定义

// both buf_size and max_files are const          const unsigned buf_size = 512, max_files = 20;          int staff_size = 27;            // nonconst          const unsigned sz = get_size();  // const value not known until run time          char input_buffer[buf_size];     // ok: const variable          string fileTable[max_files + 1]; // ok: constant expression          double salaries[staff_size];     // error: non const variable          int test_scores[get_size()];     // error: non const expression          int vals[sz];                    // error: size not known until run time

注意点:

1. 数组的维数必须是const的,对于这一点很诧异,第二条语句居然不通过,而第5条则可以,不知道编译器是怎么搞的
2. 维数声明在变量后面,c#则在前面

2.显示初始化({})

const unsigned array_size = 3;int ia[array_size] = {0, 1, 2};

3.特殊的字符数组

由于字符串非常常用，所以特殊一些

char ca1[] = {
   'C', '+', '+'};                // no null          char ca2[] = {
   'C', '+', '+', '\0'};         // explicit null          char ca3[] = "C++";     // null terminator added automatically

注意:

1. ca2和ca3是相同的,维数为4(注意数组不要超界) const char ch3[6] = "Daniel"; // error: Daniel is 7 elements
2. 数组不可直接复制和赋值的

int ia[] = {0, 1, 2}; // ok: array of intsint ia2[](ia);        // error: cannot initialize one array with anotherint main(){    const unsigned array_size = 3;    int ia3[array_size]; // ok: but elements are uninitialized!    ia3 = ia;           //  error: cannot assign one array to another    return 0;}

4.数组下标访问

可用size_t来访问数组元素,而非数值

const size_t array_size = 10;int ia[array_size]; // 10 ints, elements are uninitialized// loop through array, assigning value of its index to each elementfor (size_t ix = 0; ix != array_size; ++ix)    ia[ix] = ix;

数组是很多数据结构的基础,长度不可变,较为底层,可用c++标准库中的一些高级数据结构来简化数组的操作