1. set之间的比较
Standard C++ Library Reference |
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Operators
Tests if the set or multiset object on the left side of the operator is not equal to the set or multiset object on the right side. |
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Tests if the set or multiset object on the left side of the operator is less than the set or multiset object on the right side. |
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Tests if the set or multiset object on the left side of the operator is less than or equal to the set or multiset object on the right side. |
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Tests if the set or multiset object on the left side of the operator is equal to the set or multiset object on the right side. |
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Tests if the set or multiset object on the left side of the operator is greater than the set or multiset object on the right side. |
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Tests if the set or multiset object on the left side of the operator is greater than or equal to the set or multiset object on the right side. |
Specialized Template Functions
Exchanges the elements of two sets or multisets. |
Classes
Used for the storage and retrieval of data from a collection in which the values of the elements contained are unique and serve as the key values according to which the data is automatically ordered. |
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Used for the storage and retrieval of data from a collection in which the values of the elements contained need not be unique and in which they serve as the key values according to which the data is automatically ordered. |
2.Set支持的一些操作
注意,set不支持像vector一样的下标[]操作,如果想遍历元素,只能使用iterator来实现。
Standard C++ Library Reference |
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Typedefs
A type that represents the allocator class for the set object. |
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A type that provides a bidirectional iterator that can read a const element in the set. |
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A type that provides a pointer to a const element in a set. |
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A type that provides a reference to a const element stored in a set for reading and performing const operations. |
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A type that provides a bidirectional iterator that can read any const element in the set. |
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A signed integer type that can be used to represent the number of elements of a set in a range between elements pointed to by iterators. |
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A type that provides a bidirectional iterator that can read or modify any element in a set. |
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A type that provides a function object that can compare two sort keys to determine the relative order of two elements in the set. |
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The type describes an object stored as an element of a set in its capacity as sort key. |
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A type that provides a pointer to an element in a set. |
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A type that provides a reference to an element stored in a set. |
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A type that provides a bidirectional iterator that can read or modify an element in a reversed set. |
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An unsigned integer type that can represent the number of elements in a set. |
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The type that provides a function object that can compare two elements to determine their relative order in the set. |
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The type describes an object stored as an element of a set in its capacity as a value. |
Member Functions
Returns an iterator that addresses the first element in the set. |
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Erases all the elements of a set. |
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Returns the number of elements in a set whose key matches a parameter-specified key. |
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Tests if a set is empty. |
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Returns an iterator that addresses the location succeeding the last element in a set. |
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Returns a pair of iterators respectively to the first element in a set with a key that is greater than a specified key and to the first element in the set with a key that is equal to or greater than the key. |
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Removes an element or a range of elements in a set from specified positions or removes elements that match a specified key. |
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