STL 之reverse,reverse_copy,rotate,rotate_copy
作用:倒置或调换区间元素的位置
声明:
- #include
- template <class biDirectionalItr>
- void reverse(biDirectionalItr first, biDirectionalItr last);
- template <class biDirectionalItr, class outputItr>
- outputItr reverse_copy(biDirectionalItr first, biDirectionalItr last,outputItr destFirst);
- template <class forwardItr>
- void rotate(forwardItr first, forwardItr newFirst, forwardItr last);
- template <class forwardItr, class outputItr>
- outputItr rotate_copy(forwardItr first, forwardItr middle, forwardItr middle,last,outputItr destFirst);
示例代码:
- #include
- #include
- #include
- #include
- #include
- #include
- #include
- #include
- using namespace std;
- int main() {
- int temp[10] = {1,3,5,7,9,0,2,4,6,8};
- list<int> intList(temp,temp+10);
- list<int> resultList;
- list<int>::iterator listItr;
- ostream_iterator<int> screen(cout," ");
- cout << "intList" << endl;
- copy(intList.begin(),intList.end(),screen);
- cout << endl;
- // 倒置
- reverse(intList.begin(),intList.end());
- cout << "intList" << endl;
- copy(intList.begin(),intList.end(),screen);
- cout << endl;
- // reverse_copy
- reverse_copy(intList.begin(),intList.end(),back_inserter(resultList));
- cout << "resultList:" << endl;
- copy(resultList.begin(),resultList.end(),screen);
- cout << endl;
- listItr = intList.begin();
- listItr++;
- listItr++;
- cout << "intList before ratete" << endl;
- copy(intList.begin(),intList.end(),screen);
- cout << endl;
- // rotate
- rotate(intList.begin(),listItr,intList.end());
- cout << "intList after ratete" << endl;
- copy(intList.begin(),intList.end(),screen);
- cout << endl;
- resultList.clear();
- // rotate_copy
- rotate_copy(intList.begin(),listItr,intList.end(),back_inserter(resultList));
- cout << "intList after ratete_copy" << endl;
- copy(intList.begin(),intList.end(),screen);
- cout << endl;
- cout << "resultList:" << endl;
- copy(resultList.begin(),resultList.end(),screen);
- cout << endl;
- resultList.clear();
- // 牛逼闪闪的用法
- rotate_copy(intList.begin(),find(intList.begin(),intList.end(),6),intList.end(),back_inserter(resultList));
- cout << "resultList:" << endl;
- copy(resultList.begin(),resultList.end(),screen);
- cout << endl;
- return 0;
- }
运行结果:
intList
1 3 5 7 9 0 2 4 6 8
intList
8 6 4 2 0 9 7 5 3 1
resultList:
1 3 5 7 9 0 2 4 6 8
intList before ratete
8 6 4 2 0 9 7 5 3 1
intList after ratete
4 2 0 9 7 5 3 1 8 6
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