c++ STL(2)

 1 #include "stdafx.h"
 2 #include<iostream>
 3 #include<vector>
 4 #include<algorithm>
 5 using namespace std;
 6 int main()
 7 {
 8     vector<int> v = { 10,98,76,66,67,66,90 };
 9     cout << "排序前的数组: ";
10     for (int elem : v) {
11         cout << elem << " ";            //如何输出
12     }
13     cout << endl;
14     stable_sort(v.begin(), v.end());    //此排序方式为稳定排序，适用于v中有相同元素，如上面有2个66的情况，
15                                         //这样就不会改变两个66的相对位置。如果没有重复元素的话，用sort(v.begin(), v.end())方可  
16     cout << "排序后的数组: ";
17     for (int elem : v) {
18         cout << elem << " ";            //如何输出
19     }
20     cout << endl;
21     fill(v.begin()+2, v.end(), 54);    //填充
22     cout << "此时的数组:   ";           
23     for (int elem : v) {
24         cout << elem << " ";            //如何输出
25     }
26     cout << endl;
27     fill_n(v.begin(), 3, 8);           //填充的另一种方式
28     cout << "此时的数组:   ";
29     for (int elem : v) {
30         cout << elem << " ";            //如何输出
31     }
32     cout << endl;
33     return 0;
34 }

1 for_each (int elem in v) 
2 {
3        cout << elem << " ";  
4 }

1 for_each (v.begin(),v.end(),[](int elem) 
2 {
3        cout << elem << " "; 
4 }

1 for (int elem : v) 
2 {
3        cout << elem << " ";
4 }

 1 #include "stdafx.h"
 2 #include<iostream>
 3 #include<vector>
 4 #include<string>
 5 #include<algorithm>
 6 using namespace std;
 7 int main()
 8 {
 9     string s1 = "hello world.";
10     string s2;
11     transform(s1.begin(), s1.end(), s2.begin(), toupper);   //同样大写变小写就是tolower
12     cout << s1 << endl;
13 }

 1 #include "stdafx.h"
 2 #include<iostream>
 3 #include<vector>
 4 #include<string>
 5 #include<algorithm>
 6 using namespace std;
 7 int main()
 8 {
 9     vector<int> v= { 10,98,76,45,66,67,90 };
10     if (binary_search(v.begin(), v.end(),67))
11         cout << "Exits!" << endl;
12     else
13         cout << "Didn‘t exits!" << endl;
14 }

 1 #include "stdafx.h"
 2 #include<iostream>
 3 #include<vector>
 4 #include<string>
 5 #include<algorithm>
 6 using namespace std;
 7 int main()
 8 {
 9     vector<int> v= { 10,98,76,45,66,67,90 };
10     cout << "反转前的数列为: ";
11     for (int elem : v) 
12     {
13         cout << elem << " ";  
14     }
15     cout << endl;
16     reverse(v.begin(), v.end());
17     cout << "反转后的数列为: ";
18     for (int elem : v) 
19     {
20         cout << elem << " "; 
21     }
22     cout << endl;
23     return 0;
24 }

 1 #include "stdafx.h"
 2 #include<iostream>
 3 #include<vector>
 4 #include<string>
 5 #include<algorithm>
 6 using namespace std;
 7 int main()
 8 {
 9     vector<int> v = { 1,2,3,4,5,6,7,8,9 };
10     stable_partition(v.begin(), v.end(), [](int elem)
11     {
12         return elem % 2 == 0;
13     }); 
14     for (int elem : v)
15     {
16          cout << elem << " ";
17     }
18     cout << endl;
19     return 0;
20 }