字符串
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string str = "this is a string"; for(auto ch : str) cout << ch << endl; |
等價于
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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; |
等價于
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for(int i = 0; i < v.size(); i++) cout << v[i] << endl; |
二維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; |
等價于
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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; |
數組
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int ary[] = {1, 2, 3, 4, 5}; for(auto i : ary) cout << i << endl; |
等價于
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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; |
等價于
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for(map<char, int> :: iterator itr = m.begin(); itr != m.end(); itr++) cout << itr ->first << ' ' << itr ->second << endl; |
到此這篇關于C++11的for循環的新用法的文章就介紹到這了,更多相關C++11 for循環內容請搜索服務器之家以前的文章或繼續瀏覽下面的相關文章希望大家以后多多支持服務器之家！
原文鏈接：https://www.cnblogs.com/lMonster81/p/10433840.html
