在C++11中,我们可以像Java中的foreach一样,写出更简洁的循环代码。 intarray[5]={1,2,3,4,5};for(auto&i:array){// do sth.} 对于更复杂的数据结构,新的for循环能更好地提升coding效率 map<string,int>m{{"a",1},{"b",2},{"c",3}};for(autoit:m){std::cout<<it.first<<" : "<<it...
The range-based for statement has a syntax that looks like this: for (element_declaration : array_object) statement; When a range-based for loop is encountered, the loop will iterate through each element in array_object. For each iteration, the value of the current array element will be ...
那段range-based for loops代码等价于如下: for(auto _pos=coll.begin(); _pos != coll.end(); ++_pos ) {constauto& elem = *_pos; std::cout<< elem <<std::endl; } 1. 2. 3. 4. intarray[] = {1,2,3,4,5};longsum=0;//process sum of all elementsfor(intx : array) { sum...
IfRis an array of unknown bound or an array of incomplete type, the program is ill-formed. If the type of/* range */is a reference to a class typeC, and searches in the scope ofCfor the names “begin” and “end” each find at least one declaration, then/* begin-expr */is/*...
The last rule (the fallback to the free-standingbegin()andend()functions) allows us to non-invasively adapt an existing container to the range-basedforloop interface. 0.2 类型推断 std::vector<int> v = {1, 2, 3, 5, 7, 11};
:cout << '\n'; int a[] = {0, 1, 2, 3, 4, 5}; for (int n : a) // the initializer may be an array std::cout << n << ' '; std::cout << '\n'; for (int n : a) std::cout << 1 << ' '; // the loop variable need not be used std::cout << '\n'; ...
One of the more frequently used C++ constructs I use is the range-based for loop. The range-based forloop format was introduced in C++11, so you’ll need to enable that language set (or newer) to reap the benefits. This feature simplifies the verbosity of for loop constructs and is jus...
C++ code to demonstrate example of range-based loop with an array. // C++ program to demonstrate example of// range-based loop (for-each/ enhanced for loop)#include <iostream>usingnamespacestd;intmain(){intarr[]={1,2,3,4,5,6,7,8,9};cout<<"\nDemonstration of for-each in C++"<...
程序输出结果: 代码语言:javascript 复制 0149162536496481100121144169196225256289324361 参考资料 [1]C++ Primer中文版(第5版) [2]Range-based for loop (since C++11) [3]C++11 新特性之Range-based for loops
Updates the range based on a single-dimensional array of row properties, encapsulating things like font, fill, borders, and alignment. showCard() Displays the card for an active cell if it has rich value content. showGroupDetails(groupOption) Shows the details of the row or column group. sho...