字符串
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string str = "this is a string"; for(auto ch : str) cout << ch << endl; |
等价于
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for(int i = 0; i < str.size(); i++) cout << str[i] << endl;vectorvector<int> v = {1, 2, 3, 4, 5}; for(auto i : v) cout << i << endl; |
等价于
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for(int i = 0; i < v.size(); i++) cout << v[i] << endl; |
二维vector
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vector<vector<int>> v = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}}; for(auto i : v) for(auto j : i) cout << j << endl; |
等价于
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for(int i = 0; i < v.size(); i++) for(int j = 0; j < v[i].size(); j++) cout << v[i][j] << endl; |
数组
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int ary[] = {1, 2, 3, 4, 5}; for(auto i : ary) cout << i << endl; |
等价于
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for(int i = 0; i < 5; i++) cout << ary[i] << endl;mapmap<char, int> m = {{'a', 1}, {'b', 2}, {'c', 3}}; for(auto t : m) cout << t.first << ' ' << t.second << endl; |
等价于
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for(map<char, int> :: iterator itr = m.begin(); itr != m.end(); itr++) cout << itr ->first << ' ' << itr ->second << endl; |
到此这篇关于C++11的for循环的新用法的文章就介绍到这了,更多相关C++11 for循环内容请搜索服务器之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持服务器之家！
原文链接：https://www.cnblogs.com/lMonster81/p/10433840.html
