vector::empty ，vector::end ， vector::erase

来源：互联网发布：热云数据编辑：程序博客网时间：2024/04/26 19:43

vector::empty

// vector::empty#include <iostream>#include <vector>using namespace std;int main (){  vector<int> myvector;  int sum (0);  for(int i=1;i<=10;i++) myvector.push_back(i);  while (!myvector.empty())  {     sum += myvector.back();     myvector.pop_back();  }  cout << "total: " << sum << '\n';  //输出 total： 55   return 0;}

vector::end

// vector::begin/end#include <iostream>#include <vector>using namespace std;int main (){   vector<int> myvector;  for (int i=1; i<=5; i++) myvector.push_back(i);    vector<int>::iterator it;     cout << "myvector contains:";  for ( it = myvector.begin() ; it != myvector.end(); ++it)    cout << ' ' << *it;    cout << '\n';  return 0;}//Output://myvector contains: 1 2 3 4 5

vector::erase

// erasing from vector#include <iostream>#include <vector>using namespace std;int main (){    vector<int> myvector;  // set some values (from 1 to 10)  for (int i=1; i<=10; i++) myvector.push_back(i);  // erase the 6th element  myvector.erase (myvector.begin()+5);  // erase the first 3 elements:  myvector.erase (myvector.begin(),myvector.begin()+3);   cout << "myvector contains:";  for (unsigned i=0; i<myvector.size(); ++i)    cout << ' ' << myvector[i];    cout << '\n';  return 0;}//Output://myvector contains: 4 5 7 8 9 10

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