valarray<bool> 类

bool 类型的元素的类模板 valarray<Type> 的专用版本。

语法

class valarray<bool>

示例

// valarray_bool.cpp
// compile with: /EHsc
#include <valarray>
#include <iostream>

int main( )
{
   using namespace std;
   int i;

   valarray<int> vaL ( 10 ), vaR ( 10 );
   valarray<bool> vaBool ( 10 );
   for ( i = 0 ; i < 10 ; i += 2 )
      vaL [ i ] =  -i;
   for ( i = 1 ; i < 10 ; i += 2 )
      vaL [ i ] =  i;
   for ( i = 0 ; i < 10 ; i++ )
      vaR [ i ] =  i;

   cout << "The initial Left valarray is: ( ";
   for ( i = 0 ; i < 10 ; i++ )
      cout << vaL [ i ] << " ";
   cout << ")." << endl;

   cout << "The initial Right valarray is: ( ";
   for ( i = 0 ; i < 10 ; i++ )
      cout << vaR [ i ] << " ";
   cout << ")." << endl;

   vaBool = ( vaL < vaR );
   cout << "The result of the less-than comparison "
   << "test is the\nvalarray<bool>: ( ";
   for ( i = 0 ; i < 10 ; i++ )
      cout << vaBool [ i ] << " ";
   cout << ")." << endl;
}
/* Output:
The initial Left valarray is: ( 0 1 -2 3 -4 5 -6 7 -8 9 ).
The initial Right valarray is: ( 0 1 2 3 4 5 6 7 8 9 ).
The result of the less-than comparison test is the
valarray<bool>: ( 0 0 1 0 1 0 1 0 1 0 ).
*/

要求

标头：<valarray>

命名空间： std

另请参阅

valarray 类
C++ 标准库中的线程安全