STL-訪問向量信息

#include"iostream"

#include"vector"

#include"cstdlib"

using namespace std;

int main()

{

vectorivec(2,10);

cout<<"Max_size="<<ivec.max_size()<<endl;

cout<<"size="<<ivec.capacity()<<endl;

ivec.push_back(1);

cout<<"Afrer push,size="<<ivec.size()<<endl;

cout<<"capacity="<<ivec.capacity()<<endl;

ivec.push_back(2);

cout<<"After push,size="<<ivec.size()<<endl;

cout<<"capacity="<<ivec.capacity()<<endl;

ivec.push_back(3);

cout<<"size="<<ivec.size()<<endl;

cout<<"capacity="<<ivec.capacity()<<endl;

ivec.push_back(4);

cout<<"size="<<ivec.size()<<endl;

cout<<"capacity="<<ivec.capacity()<<endl;

for(int i=0;i

cout<<ivec[i]<<' ';

cout<<endl;

ivec.pop_back();

ivec.pop_back();

cout<<"size="<<ivec.size()<<endl;

cout<<"capacity="<<ivec.capacity()<<endl;

ivec.clear();

cout<<"size="<<ivec.size()<<endl;

cout<<"capacity="<<ivec.capacity()<<endl;

ivec[0]=1;

cout<<"size="<<ivec.size()<<endl;

cout<<"capacity="<<ivec.capacity()<<endl;

ivec[1]=3;

ivec[100]=9; 

cout<<"size="<<ivec.size()<<endl;

cout<<"capacity="<<ivec.capacity()<<endl;

cout<<ivec[0]<<' '<<ivec[1]<<' '<<ivec[4]<<' '<<ivec[100]<<' '<<endl; 

system("pause");

return 0;

}