STL Algorithm 2

Modified algorithm

First, copy

Copy (Myvector.begin (), Myvector.end (), L1.begin ()), L1 must be capacity before copying, or the system will error

Copy_backward (Myvector.begin (), Myvector.end (), L1.end ()), and in L1 is copied from the back forward

Copy (Myvector.begin (), Myvector.end (),ostream_iterator<int> (cout, ",")), comma-delimited output

Second, transform ()

Simultaneous replication and transformation

Transform (V1.begin (), V1.end (), Back_inserter (L2), negate<int> ());//Multiply the number in V1 by-1, copy it into L2, and Back_inserter is the back iterator, You can copy without initializing capacity
cout << "List2" << Endl;
For_each (L2.begin (), L2.end (), print);
cout << Endl;
cout << "elements in L2 multiplied by ten" << Endl;
Transform (L2.begin (), L2.end (), L2.begin (), bind2nd (Multiplies<int> (), 10));
For_each (L2.begin (), L2.end (), print);
cout << Endl;
Transform (L2.begin (), L2.end (), ostream_iterator<int> (cout, ""), bind2nd (Divides<int> (), 2));// The elements in the L2 do not change, just the output
cout << Endl;
Transform (L2.begin (), L2.end (), L2.begin (), ostream_iterator<int> (cout, ","), multiplies<int> ());// The elements in the L2 and the elements in the L2 are multiplied separately by the output

Iii. Exchange

Swap (v1, v2);//Exchange V1,v2

Swap_ranges (V1.begin (), V1.begin () + 5, V2.begin ());//exchange of elements of a certain range

Iv. filling elements

Fill (V1.begin (), V1.begin () + 4, 9),//from v1[0] to V1[4] becomes 9

Fill_n (V1.begin (), 5,//v1[0] to v1[4] becomes 20

Generate (V2.begin (), V2.end (), Rand);//Generate random numbers

Generate (V2.begin (), 3,rand);//generate 3 random numbers

V. Replacement

Replace (V1.begin (), V1.end (), 7),//v1[6] becomes 99

Replace_if (V1.begin (), V1.end (), bind2nd (Less<int> (), 10), 11);//The judging condition is true replace

Vi. reversal

Reverse (V1.begin (), V1.end ());

Reverse_copy (V1.begin (), V1.end (),ostream_iterator<int> (cout, ",");//Reverse Output

Seven, rotation

Rotate (V1.begin (), V1.begin () +4,v1.end ());

Rotate_copy (V1.begin (), V1.begin () +3,v1.end (),ostream_iterator<int> (cout, ",");

STL Algorithm 2