1. 简介
| 函数 |
作用 |
文档 |
copy(beg,end,res) |
复制[beg,end)到res
|
copy() |
copy_backward(beg,end,res) |
与copy()相同，不过元素是以相反顺序被拷贝。 |
copy_backward() |
2. 示例代码
// copy algorithm example
#include <iostream> // std::cout
#include <algorithm> // std::copy
#include <vector> // std::vector
int main () {
int myints[]={10,20,30,40,50,60,70};
std::vector<int> myvector (7);
std::copy ( myints, myints+7, myvector.begin() );
std::cout << "myvector contains:";
for (std::vector<int>::iterator it = myvector.begin(); it!=myvector.end(); ++it)
std::cout << ' ' << *it;
std::cout << '\n';
return 0;
}
// copy_backward example
#include <iostream> // std::cout
#include <algorithm> // std::copy_backward
#include <vector> // std::vector
int main () {
std::vector<int> myvector;
// set some values:
for (int i=1; i<=5; i++)
myvector.push_back(i*10); // myvector: 10 20 30 40 50
myvector.resize(myvector.size()+3); // allocate space for 3 more elements
std::copy_backward ( myvector.begin(), myvector.begin()+5, myvector.end() );
std::cout << "myvector contains:";
for (std::vector<int>::iterator it=myvector.begin(); it!=myvector.end(); ++it)
std::cout << ' ' << *it;
std::cout << '\n';
return 0;
}
3. 练习
