for(element_declaration:range_expression){// 循环体} 其中,element_declaration是用来声明一个变量,这个变量将用于遍历range_expression的每个元素。range_expression是一个序列(如数组、容器、字符串等),表示要遍历的一系列元素。 在循环体中,可以使用element_declaration来访问当前正在遍历的元素。 下面示例,演示了如何...
for (for-range-declaration:expression) 语句 备注 使用基于范围的for语句构造必须在“范围”中执行的循环,它定义为可循环访问的任何内容 - 例如,std::vector或其范围由begin()和end()定义的任何其他 C++ 标准库序列。for-range-declaration部分中声明的名称是for语句的本地名称,且无法在expression或statement中...
for(for-range-declaration : expression ) statement 看一段示例代码: #include<iostream>#include<vector>using namespacestd;intmain(){cout<<"Test 1 : ";// Basic 10-element integer array.intx[10] = {1,2,3,4,5,6,7,8,9,10};// Range-based for loop to iterate through the array.for(...
for (for-range-declaration:expression) 陳述式 備註 使用範圍型的for陳述式來建構必須透過「範圍」執行的迴圈,這個「範圍」被定義為您可以逐一查看的任何內容,例如std::vector,或其範圍由begin()和end()定義的任何其他 C++ 標準程式庫序列。 在for-range-declaration部分中宣告的名稱是for陳述式的區域變數,不...
for ( for-range-declaration : expression ) statement 备注 使用基于范围的 for 语句构造必须通过“范围”执行,定义为任何可以通过为的示例,std::vector的循环,或者范围由 begin() 和 end()定义的其他 STL 序列。 在 for-range-declaration 部分中声明的名称在本地。for 语句,不能重新声明在 expression 或 sta...
for ( for-range-declaration : expression ) statement 注意一般用auto表达类型。不需要修改时常用引用类型 例子: 1 // range-based-for.cpp 2 // compile by using: cl /EHsc /nologo /W4 3 #include <iostream> 4 #include <vector> 5 using namespace std; ...
Here, the rangedforloop iterates the arraynumfrom beginning to end. Theintvariablevarstores the value of the array element in each iteration. Its syntax is, for(rangeDeclaration : rangeExpression) {// code} In the above example, rangeDeclaration-int var ...
First operand in a binary 'If' expression must be nullable or a reference type First statement of a method body cannot be on the same line as the method declaration First statement of this 'Sub New' must be a call to 'MyBase.New' or 'MyClass.New' (More Than One Acces...
Range-based for loops.You can write more robust loops that work with arrays, STL containers, and Windows Runtime collections in the form for ( for-range-declaration : expression ). This is part of the Core Language support. For more information, seeRange-based for Statement (C++). ...
range_declaration - a declaration of a named variable, whose type is the type of the element of the sequence represented by range_expression, or a reference to that type. Often uses the auto specifier for automatic type deduction range_expression - any expression that represents a suitable seque...