我正在完成一个Stack程序,并且不确定如何制定一个方法来确定Stack上的所有值是否小于传递的值。
因此,例如,对于包含top-(1)(1)(2)(3)(5)(5)(2)的堆栈,allSmallerThan(3)应该返回false,因为堆栈上的值更大另一方面,对于包含top-(1)(1)(2)(3)(5)(5)(2)的堆栈,allSmallerThan(12)应该返回true,因为堆栈上的所有值都是不到12岁。
我已经制作了操作签名
int Stack<Object>::allSmallerThan( const Object & data ) const;
但在那之后,我有点难过去哪里
以下是完整的实施文件。大部分文件都发给我们,我们被要求完成某些操作。这个特别是杀人
#ifndef STACK_CPP
#define STACK_CPP
#include "Stack.h"
namespace cs20 {
template <class Object>
Stack<Object>::Stack() {
topNode = NULL;
}
template <class Object>
Stack<Object>::Stack( const Stack<Object>& rhs ) {
topNode = NULL;
*this = rhs;
}
template <class Object>
Stack<Object>::~Stack() {
makeEmpty();
delete topNode;
}
template <class Object>
bool Stack<Object>::isEmpty() const {
return( (topNode == NULL) );
}
template <class Object>
void Stack<Object>::makeEmpty() {
while (!isEmpty()) {
pop();
}
}
template <class Object>
int Stack<Object>::allSmallerThan( const Object & data ) const{
}
template <class Object>
void Stack<Object>::push( const Object& data ) {
StackNode<Object>* newNode = new StackNode<Object>( data, topNode );
topNode = newNode;
}
template <class Object>
void Stack<Object>::pop() {
if (isEmpty()) {
throw EmptyStack();
}
StackNode<Object> *oldTop = topNode;
topNode = topNode->getNext();
delete oldTop;
}
template <class Object>
const Object& Stack<Object>::top( ) const {
if (isEmpty()) {
throw EmptyStack();
}
StackNode<Object> node = *topNode;
return( node.getElement() );
}
template <class Object>
Object Stack<Object>::topAndPop( ) {
Object o = top();
pop();
return( o );
}
// Deep copy of linked Stack
template <class Object>
const Stack<Object>& Stack<Object>::operator =( const Stack<Object>& rhs ) {
if (this != &rhs) {
makeEmpty();
if (!(rhs.isEmpty())) {
StackNode<Object> * rhsTopNode = rhs.topNode;
StackNode<Object> * myTopNode = new StackNode<Object>( rhsTopNode->getElement() );
topNode = myTopNode;
rhsTopNode = rhsTopNode->getNext();
while (rhsTopNode != NULL) {
myTopNode->setNext( new StackNode<Object>( rhsTopNode->getElement() ) );
myTopNode = myTopNode->getNext();
rhsTopNode = rhsTopNode->getNext();
}
}
}
return( *this );
}
template <class Object>
std::ostream& Stack<Object>::printStack( std::ostream& outs ) const {
if (isEmpty()) {
outs << "Empty Stack";
}
else {
outs << "TOP: ";
StackNode<Object> * node = topNode;
while (node != NULL) {
outs << node->getElement();
outs << "\n "; /// for visual alignment
node = node->getNext();
}
}
return( outs );
}
}
#endif
一切顺利 谢谢!
答案 0 :(得分:3)
由于您的元素未在堆栈中排序,您必须像printStack(...)
一样手动遍历它们并自行检查值。
您可以在第一次出现时中止不小于给定值。
答案 1 :(得分:2)
循环堆栈的所有值。如果其中一个值不小于参数,则返回false。如果循环结束,则所有值都较小,因此返回true。
答案 2 :(得分:1)
类似的东西:
template <class Object>
int Stack<Object>::allSmallerThan( const Object & data ) const{
if (isEmpty()) {
outs << "Empty Stack";
}
else {
StackNode<Object> * node = topNode;
while (node != NULL) {
if (node >= data) //You need to do the comparison by hand
return (false);
node = node->getNext();
}
}
return( true );
}
答案 3 :(得分:0)
最终工作
template <class Object>
int Stack<Object>::allSmallerThan( const Object & data ) const{
if (isEmpty()) {
throw EmptyStack();
}
else {
StackNode<Object> * node = topNode;
while (node != NULL) {
if (data <= node->getElement()) //You need to do the comparison by hand
return (false);
node = node->getNext();
}
}
return( true );
}