C++ vector 遍历的几种方法
目录
- 1.迭代器
- 2.C++11 新增关键字auto
- 3.数组遍历法
- 4.基于范围的for循环
C++ vector遍历demo,多种姿势任你选~
1.迭代器
for(vector<int>::iterator it = obj.begin(); it != obj.end(); it++) { cout << *it << ","; }
2.C++11 新增关键字auto
for(auto it = obj.begin(); it != obj.end(); it++) { cout << *it << ","; }
3.数组遍历法
for(int i=0;i<obj.size();i++) { cout<<obj[i]<<","; }
4.基于范围的for循环
for (auto iter : obj) { cout << iter << ","; }
demo示例
#include <vector> #include <iostream> using namespace std; int main() { vector<int>obj; for(int i=0;i<10;i++) { obj.push_back(i); cout<<obj[i]<<","; } cout << endl << "vector size is :" << obj.size() << endl; //iterator遍历 for(vector<int>::iterator it = obj.begin(); it != obj.end(); it++) { cout << *it << ","; } cout << endl; //数组循环遍历 for(int i=0;i<obj.size();i++) { cout<<obj[i]<<","; } cout << endl; //auto关键字遍历遍历 for(auto it = obj.begin(); it != obj.end(); it++) { cout << *it << ","; } cout << endl; //基于范围的for循环 for (auto iter : obj) { cout << iter << ","; } cout << endl; return 0; }
结果展示:
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