1.下标遍历
vector <string> vec(2);
vec[0] = "123";vec[1] = "789";
for(int i = 0; i < vec.size(); i++){
cout << vec[i] <<endl;
}
结果:
2.at遍历(相比于上面的方法,会检查是否越界)
vector <string> vec(2);
vec[0] = "123";vec[1] = "789";
for(int i = 0; i < vec.size(); i++){
cout << vec.at(i) <<endl;
}
结果:
3.data遍历(需要和指针配合使用)
vector <string> vec(2);
vec[0] = "123";vec[1] = "789";
string *p = vec.data();
for(int i = 0; i < vec.size(); i++,p++){
cout << *p << endl;
}
结果:
4.迭代器遍历
vector <string> vec;
vec.push_back("123");vec.push_back("789");
vector<string>::iterator it;
for(it = vec.begin(); it != vec.end(); it++){
cout << *it << endl;
}
结果:
5.访问vector的第一个元素
vector <string> vec;
vec.push_back("123");vec.push_back("789");
cout << vec.front();
6.访问vector的最后一个元素
vector <string> vec;
vec.push_back("123");vec.push_back("789");
cout << vec.back();