栈的操作：进栈，出栈，读栈顶元素

代码：

#include<iostream>
using namespace std;
template<class T>
class sq_Stack
{private:int mm;int top;T *s;public:sq_Stack(int);void prt_sq_Stack();int flag_sq_Stack();void ins_sq_Stack(T);T del_sq_Stack();T read_sq_Stack();
};
template<class T>
sq_Stack<T>::sq_Stack(int m)
{mm=m;s=new T[mm];top=0;return;
}
template<class T>
void sq_Stack<T>::prt_sq_Stack()
{int i;cout<<"top="<<top<<endl;for(i=top;i>0;i--)cout<<s[i-1]<<endl;return;
}
template<class T>
int sq_Stack<T>::flag_sq_Stack()
{if(top==mm)return(-1);if(top==0) return(0);return(1);
}
template<class T>
void sq_Stack<T>::ins_sq_Stack(T x)
{if(top==mm){cout<<"Stack overflow!"<<endl;return;}top=top+1;s[top-1]=x;return;}
template<class T>
T sq_Stack<T>::del_sq_Stack()
{T y;if(top==0){cout<<"Stack underflow1"<<endl;return(0);}y=s[top-1];top=top-1;return(y);}
template<class T>
T sq_Stack<T>::read_sq_Stack()
{if(top==0){cout<<"Stack empty!"<<endl;return(0);}return(s[top-1]);
}
int main()
{sq_Stack<int>s(10);s.ins_sq_Stack(50);s.ins_sq_Stack(60);s.ins_sq_Stack(70);s.ins_sq_Stack(80);s.ins_sq_Stack(90);s.ins_sq_Stack(100);cout<<"输出栈顶指针与栈中的元素:"<<endl;s.prt_sq_Stack();cout<<"栈顶元素:"<<s.read_sq_Stack()<<endl;cout<<"输出退栈元素："<<endl;cout<<s.del_sq_Stack()<<endl;cout<<s.del_sq_Stack()<<endl;cout<<s.del_sq_Stack()<<endl;cout<<"再次输出栈顶指针与栈中的元素:"<<endl;s.prt_sq_Stack();return 0;}

运行：