copy_n:

Copies exactly count values from the range beginning at first to the range beginning at result, if count>0.

从源处拷贝n个数到目标处

1 #include 
     
        2 #include 
      
         3 #include 
       
          4 #include 
        
           5   6 using namespace std;  7   8 int main()  9 { 10     int str[] = { 1, 2, 3, 4, 5}; 11     int dst[5] {}; 12  13     copy_n(str, 5, dst); 14     for (auto &v : str) 15         cout << v << " "; 16     cout << endl; 17  18     vector
         
           v_s { 1, 2, 3 ,4, 5}; 19     vector
          
            v_d; 20 list
           
             l_d; 21 22 copy_n(v_s.begin(), 5, v_d.begin()); 23 for (auto &v : v_d) 24 cout << v << endl; 25 26 copy_n(v_s.begin(), 5, l_d.begin()); 27 for (auto &v : l_d) 28 cout << v << endl; 29 }