ps怎么做网站导航,什么网站做产品销售做的好,企业网址搭建,互联网做网站怎么赚钱一个笔试题#xff0c;当时竟然没想出来#xff0c;现在实现下 1 /*2 用两个栈实现双端队列3 栈s1#xff0c;s2。4 pushback()和popback(),必须在s2为空的情况#xff0c;把s2的都放s1中5 pushfront()和popfront(),必须是在s1为空#xff0c;把s1的都给放到s2中6 */7 #in…一个笔试题当时竟然没想出来现在实现下 1 /*2 用两个栈实现双端队列3 栈s1s2。4 pushback()和popback(),必须在s2为空的情况把s2的都放s1中5 pushfront()和popfront(),必须是在s1为空把s1的都给放到s2中6 */7 #include iostream8 #include stack9 using namespace std;10 template typename T11 class DequeBy2Stack12 {13 private:14 int maxsize;15 stackT s1;16 stackT s2;17 public:18 DequeBy2Stack(int size):maxsize(size){}19 void pushback(T n);20 T popback();21 void pushfront(T n);22 T popfront();23 int size();24 bool empty();25 };26 template typename T27 bool DequeBy2StackT::empty()28 {29 return s2.empty()s1.empty();30 }31 template typename T32 int DequeBy2StackT::size()33 {34 return s1.size()s2.size();35 }36 template typename T37 void DequeBy2StackT::pushback(T n)38 {39 if(this-size()maxsize)40 {41 throw new std::exception(Invalid push);42 }43 while(!s2.empty()) //必须将s2中的数据都导入到s1中44 {45 int tmps2.top();46 s1.push(tmp);47 s2.pop();48 }49 s1.push(n);50 }51 template typename T52 T DequeBy2StackT::popback()53 {54 while(!s2.empty())55 {56 int tmps2.top();57 s1.push(tmp);58 s2.pop();59 }60 if(!s1.empty())61 {62 int tmps1.top();63 s1.pop();64 return tmp;65 }66 else67 {68 throw new exception(Invalid popback());69 }70 }71 template typename T72 void DequeBy2StackT::pushfront(T n)73 {74 if(this-size()maxsize)75 {76 throw new std::exception(Invalid push);77 }78 while(!s1.empty())79 {80 int tmps1.top();81 s2.push(tmp);82 s1.pop();83 }84 s2.push(n);85 }86 template typename T87 T DequeBy2StackT::popfront()88 {89 while(!s1.empty())90 {91 int tmps1.top();92 s2.push(tmp);93 s1.pop();94 }95 if(!s2.empty())96 {97 int tmps2.top();98 s2.pop();99 return tmp;
100 }
101 else
102 {
103 throw new exception(Invalid popfront);
104 }
105 }
106
107 int main()
108 {
109 DequeBy2Stackint test(8);
110 int n;
111 for(int i1;i8;i)
112 {
113 test.pushback(i);
114 }
115 test.popback();
116 test.popfront();
117 test.popfront();
118 test.popfront();
119 test.pushfront(100);
120 test.pushfront(101);
121 test.pushback(30);
122 test.pushfront(102);
123 test.popfront();
124 while(!test.empty())
125 couttest.popback()endl;
126 system(pause);
127 }
128 转载于:https://www.cnblogs.com/zmlctt/p/3985128.html
