順序容器的5種初始化方法

標籤：c++   容器   初始化   

#include <iostream>#include <string>#include <vector>#include <algorithm>using namespace std;int main(int argc, const char *argv[]){    //聲明一個空的容器    vector<string> svec;    svec.push_back("HeNan");    svec.push_back("HeBei");    svec.push_back("ShanXi");    svec.push_back("ShanDong");    svec.push_back("HuBei");    cout << "svec: " << endl;    for(auto &item: svec){        cout << item << endl;    }    //聲明一個大小為5的容器    vector<string> svec1(5);    for(vector<string>::size_type it = 0; it != 5; ++it){        svec1[it] = "Hello";    }    for(vector<string>::iterator it = svec1.begin(); it != svec1.end(); ++it){        cout << *it << endl;    }    //聲明一個大小為10的容器，且全部為“shenzhen”;    vector<string> svec2(10, string("shenzhen"));    for(vector<string>::iterator it = svec2.begin(); it != svec2.end(); ++it){        cout << *it << endl;    }    //用一個容器初始化另一個容器    vector<string> svec3(svec);    for(vector<string>::iterator it = svec3.begin(); it != svec3.end(); ++it){        cout << *it << endl;    }    vector<string>::iterator rtn = find(svec.begin(), svec.end(), string("ShanXi"));    if(rtn == svec.end()){        cout << "not found!" << endl;    }    else{        cout << "found!" << endl;    }    //用一對迭代器初始化一個容器    vector<string> svec4(svec.begin(), rtn);    for(auto &item: svec4){        cout << item << endl;    }    return 0;}