operator== (<stack>)

如果在运算符左侧的堆栈对象与右侧，的堆栈对象相等测试。

bool operator==(
   const stack <Type, Container>& _Left,
   const stack <Type, Container>& _Right
);

参数

• _Left
  类型 stack对象。

• _Right
  类型 stack对象。

返回值

true，如果堆栈或堆栈相等; false，如果堆栈或堆栈不相等。

备注

堆栈对象之间的比较根据其元素的比较pairwise。两个堆栈相等;如果它们具有相同元素数目，并且其各自的元素具有相同的值。否则为不相等。

示例

// stack_op_eq.cpp
// compile with: /EHsc
#include <stack>
#include <vector>
#include <iostream>

int main( )
{
   using namespace std;

   // Declares stacks with vector base containers
   stack <int, vector<int> > s1, s2, s3;

   // The following would have cause an error because stacks with
   // different base containers are not equality comparable
   // stack <int, list<int> > s3;

   s1.push( 1 );
   s2.push( 2 );
   s3.push( 1 );

   if ( s1 == s2 )
      cout << "The stacks s1 and s2 are equal." << endl;
   else
      cout << "The stacks s1 and s2 are not equal." << endl;

   if ( s1 == s3 )
      cout << "The stacks s1 and s3 are equal." << endl;
   else
      cout << "The stacks s1 and s3 are not equal." << endl;
}

要求

标头: <stack>

命名空间: std

请参见

参考

标准模板库