stack::operator<
在 Visual C++ 演示如何使用 堆栈:: operatorAMP_LT 标准 (STL)模板库函数。
template<class _TYPE, class _C, class _A>
bool stack::operator<(
const stack<_TYPE, _C, _A>& _X
) const;
备注
备注
类/参数名在原型不匹配版本在头文件。修改某些提高可读性。
，如果在运算符左侧的堆栈大于右侧，的堆栈小于 堆栈:: operatorAMP_LT 函数返回 true。
确定堆栈是否大于另一个堆栈小于
比较这个最深的元素 (第一个元素推入堆栈)。
如果元素不同，以较小的元素的堆栈与具有最大元的堆栈小于。
如果元素是相同的，并且具有多个元素中，移动到堆栈中的下一个元素并返回步骤。
如果在堆栈上的所有元素此时处理，堆栈相等。
示例
// StackLessThan.cpp
// compile with: /EHsc
// Illustrates how to use the stack::operator<
// function to determine if one stack is less than
// another stack.
//
// Functions:
//
// operator< : Returns true if the stack is smaller than the stack
// passed as the operand.
//////////////////////////////////////////////////////////////////////
#pragma warning(disable:4786)
#include <stack>
#include <iostream>
using namespace std ;
typedef stack<double> STACK_DOUBLE;
int main()
{
STACK_DOUBLE stack1,stack2;
// Add item 4.0 to Stack1. Stack1 contains 4.0.
cout << "stack1.push(4.0) s1=[4.0]" << endl;
stack1.push(4.0);
// Add item 3.0 to Stack1. Stack1 contains 3.0(top) and 4.0(bottom).
cout << "stack1.push(3.0) s1=[3.0 4.0]" << endl;
stack1.push(3.0);
// Add item 4.0 to Stack2. Stack2 contains 4.0 (top=bottom).
cout << "stack2.push(4.0) s2=[4.0]" << endl;
stack2.push(4.0);
// Compare if Stack1 is smaller than Stack2. Should return False.
cout << "stack1<stack2 is " <<
((stack1<stack2)? "True": "False") << endl << endl;
// Add item 6.0 to Stack2. Stack2 contains 6.0(top) and 4.0(bottom).
cout << "stack2.push(6.0) s2=[6.0 4.0]" << endl;
stack2.push(6.0);
// Compare if Stack1 is smaller than Stack2. Should return True.
cout << "stack1<stack2 is " <<
((stack1<stack2)? "True": "False") << endl << endl;
// Add item 8.0 to Stack2. Stack2 contains 8.0(top), 6.0 and
// 4.0(bottom).
cout << "stack2.push(8.0) s2=[8.0 6.0 4.0]" << endl;
stack2.push(8.0);
// Compare if Stack1 is smaller than Stack2. Should return True.
cout << "stack1<stack2 is " <<
((stack1<stack2)? "True": "False") << endl << endl;
// Delete item 8.0 from Stack2.
cout << "stack2.pop() s2=[6.0 4.0]" << endl;
stack2.pop();
// Delete item 6.0 from Stack2.
cout << "stack2.pop() s2=[4.0]" << endl;
stack2.pop();
// Add item 3.0 to Stack2. Stack2 contains 3.0(top) and 4.0(bottom).
cout << "stack2.push(3.0) s2=[3.0 4.0]" << endl;
stack2.push(3.0);
// Compare if Stack1 is smaller than Stack2. Should return False.
cout << "stack1<stack2 is " <<
((stack1<stack2)? "True": "False") << endl << endl;
// Delete item 3.0 from Stack2.
cout << "stack2.pop() s2=[4.0]" << endl;
stack2.pop();
// Delete item 4.0 from Stack2.
cout << "stack2.pop() s2=[]" << endl;
stack2.pop();
// Add item 8.0 to Stack2. Stack2 contains 8.0(top=bottom).
cout << "stack2.push(8.0) s2=[8.0]" << endl;
stack2.push(8.0);
// Compare if Stack1 is smaller than Stack2. Should return True.
cout << "stack1<stack2 is " <<
((stack1<stack2)? "True": "False") << endl << endl;
}
Output
stack1.push(4.0) s1=[4.0]
stack1.push(3.0) s1=[3.0 4.0]
stack2.push(4.0) s2=[4.0]
stack1<stack2 is False
stack2.push(6.0) s2=[6.0 4.0]
stack1<stack2 is True
stack2.push(8.0) s2=[8.0 6.0 4.0]
stack1<stack2 is True
stack2.pop() s2=[6.0 4.0]
stack2.pop() s2=[4.0]
stack2.push(3.0) s2=[3.0 4.0]
stack1<stack2 is False
stack2.pop() s2=[4.0]
stack2.pop() s2=[]
stack2.push(8.0) s2=[8.0]
stack1<stack2 is True
要求
**标题:**stack