Vector operators（Vector 操作符）

Syntax:

语法：

    #include <vector>
    T& operator[]( size_type index );
    const T& operator[]( size_type index ) const;
    vector& operator=(const vector& c2);
    bool operator==(const vector& c1, const vector& c2);
    bool operator!=(const vector& c1, const vector& c2);
    bool operator<(const vector& c1, const vector& c2);
    bool operator>(const vector& c1, const vector& c2);
    bool operator<=(const vector& c1, const vector& c2);
    bool operator>=(const vector& c1, const vector& c2);

All of the C++ containers can be compared and assigned with the standard comparison operators: ==, !=, %%<=%%, >=, <, >, and =. Individual elements of a vector can be examined with the [] operator.

所有的 C++ 容器都可以使用比较操作符：==，!=，%%<=%%，>=，<，>，和 = 来比较赋值。单个的 vector 元素可以使用 [] 操作符来检查。

Performing a comparison or assigning one vector to another takes linear time.

执行两个 vector 之间的比较和赋值将花费 linear time。

The [] operator runs in constant time.

而操作符 [] 运行将花费 constant time。

Two vectors are equal if:

满足下面两个条件的 vector 是相等的：

1. Their size is the same, and (包含的元素个数是一样的，即 size 是相同的，) -
2. Each member in location i in one vect or is equal to the the member in location i in the other vector.（两个 vector 中相同位置上的元素值是相等的。）

Comparisons among vectors are done lexicographically.

vectors 之间的比较是按字典顺序执行。

For example, the following code uses the [] operator to access all of the elements of a vector:

例如，下面的代码使用 [] 操作符来访问 vector 的所有元素：

   vector<int> v( 5, 1 );
   for( int i = 0; i < v.size(); i++ ) {
     cout << "Element " << i << " is " << v[i] << endl;
   }

Related Topics: at

相关主题： at