顺序栈（进制转换 + 括号匹配 + 判断栈表 + 最长括号匹配长度）

#include <stdio.h>
#include <stdlib.h>
#include <iostream>
using namespace std;

#define TRUE 1
#define FALSE 0
#define OK 1
#define ERROR 0
#define INFEASIBLE -1
#define OVERFLOW   -2

#define STACK_INIT_SIZE 100
#define STACKLINCREMENT 10
typedef int Status;
typedef int SElemType;

typedef struct{
    SElemType *base;
    SElemType *top;
    int stacksize;
}SqStack;

Status InitStack(SqStack &S){
    //构造一个空栈S
    S.base = (SElemType *)malloc(STACK_INIT_SIZE * sizeof(SElemType));
    if(!S.base) exit(OVERFLOW);
    S.top = S.base;
    S.stacksize = STACK_INIT_SIZE;
    return OK;
}

Status Empty(SqStack S){
    //判断栈是否为空
    if( S.base == S.top)
    return OK;
    return FALSE;
}

Status GetTop(SqStack S){
    //若栈不空，则用e返回S的栈顶元素，并返回OK，否则返回ERROR
    int e;
    if(S.top == S.base) return ERROR;
    e = *(S.top - 1);
    return e;
}

Status Push(SqStack &S,SElemType e){
    //插入元素e为新的栈顶元素
    if(S.top - S.base >= S.stacksize){
        //栈满
        S.base = (SElemType *) realloc(S.base,(S.stacksize + STACKLINCREMENT) * sizeof(SElemType));

        if(!S.base) exit(OVERFLOW);
        S.top = S.base + S.stacksize;
        S.stacksize += STACKLINCREMENT;
    }

    *S.top++ = e;
    return OK;
}

int StackLength(SqStack S){
    //返回栈的长度
    return (S.top - S.base);

}
Status Pop(SqStack &S,SElemType &e){
    //若栈不空，则删除S的栈顶元素，用e返回其值，并返回KO，否则返回ERROR
    if(S.top == S.base) return ERROR;

    e = *--S.top;
    return OK;
}

void StackTraverse(SqStack S){
    while(S.top > S.base){
        printf("%d\n",*S.base++);
    }
    printf("\n");
}




//进制转换
int main()
{
    int m,k,e;
    while(cin>>m>>k)
    {
        if(m<0) {m=-m;cout<<‘-‘;}
        SqStack S;
        InitStack(S);
        while(m!=0)
        {
            Push(S,m%k);
            m=m/k;
        }
        while(!Empty(S))
        {

            if(GetTop(S)==10) cout<<‘A‘;
            else if(GetTop(S)==11) cout<<‘B‘;
            else if(GetTop(S)==12) cout<<‘C‘;
            else if(GetTop(S)==13) cout<<‘D‘;
            else if(GetTop(S)==14) cout<<‘E‘;
            else if(GetTop(S)==15) cout<<‘F‘;

            else cout<<GetTop(S);
            Pop(S,e);
        }
        cout<<endl;
    }
    return 0;
}













//括号匹配
int main()
{
    int e;
    char c[100];
    while(cin.getline(c,100))
    {
        //stack<char>st;
        SqStack S;
        InitStack(S);
        int d = 1;
        int len =strlen(c);
        for(int i = 0; i < len; i++)
        {
            if(c[i]==‘(‘||c[i]==‘{‘||c[i]==‘[‘)
                            Push(S,c[i]);
            else if(c[i]==‘)‘&&!Empty(S)&&GetTop(S)==‘(‘)
                            Pop(S,e);
            else if(c[i]==‘)‘&&!Empty(S)&&GetTop(S)!=‘(‘)
                            d=0;
            else if(c[i]==‘)‘&&Empty(S))
                            d=0;
            else if(c[i]==‘]‘&&!Empty(S)&&GetTop(S)==‘[‘)
                            Pop(S,e);
            else if(c[i]==‘]‘&&!Empty(S)&&GetTop(S)!=‘[‘)
                            d=0;
            else if(c[i]==‘]‘&&Empty(S))
                            d=0;
            else if(c[i]==‘}‘&&!Empty(S)&&GetTop(S)==‘{‘)
                            Pop(S,e);
            else if(c[i]==‘}‘&&!Empty(S)&&GetTop(S)!=‘{‘)
                            d=0;
            else if(c[i]==‘}‘&&Empty(S))
                            d=0;

            }
        if(!Empty(S)||d == 0) cout<<"no"<<endl;
        else cout<<"yes"<<endl;
    }
    return 0;
}



//判断栈表
int main()
{
    int n,e,target[100];
    while(scanf("%d", &n) == 1)
    {
        SqStack S;
        InitStack(S);
        int A = 1, B = 1;
        for(int i = 1; i <= n; i++)
        {
            scanf("%d",&target[i]);
        }
        int ok = 1;
        while(B <= n)
        {
            if(A == target[B])
            {
                A++, B++;
            }
            else if(!Empty(S) && GetTop(S) == target[B])
            {
                Pop(S,e);
                B++;
            }
            else if(A <= n) Push(S,A++);
            else
            {
                ok = 0;
                break;
            }
        }
        printf("%s\n",ok ? "Yes" : "No");
    }
    return 0;
}








//最长括号匹配长度
int main()
{
    char st[1000000];
    int t,e;
    while(cin>>t)
    {
        while(t--)
        {
            cin>>st;
            int len=strlen(st);
            SqStack S;
            InitStack(S);
            for(int i = 0;i < len;i++)
            {
                if(st[i]==‘(‘) Push(S,st[i]);
                else if(st[i]==‘)‘&& !Empty(S)&&GetTop(S)==‘(‘) Pop(S,e);
                else if(st[i]==‘)‘) Push(S,st[i]);
            }
            cout<<len - StackLength(S)<<endl;
        }
    }
    return 0;
}

typedef SElemType ElemType;
typedef LinkList LinkStack;

#define InitStack InitList
#define DestroyStack DestroyList
#define ClearStack ClearList
#define StackEmpty ListEmpty
#define StackLength ListLength

Status GetTop(LinkStack S,SElemType e)
{
    return GetElem(S,1,e);
}

Status Push(LinkStack &S,SElemType e)
{
    return ListInsert(S,1,e);
}

Status Pop(LinkStack &S,SElemType &e)
{
    return ListDelete(S,1,e);
}

void StackTraverse(LinkStack S)
{
    LinkStack temp,p = S;
    InitStack(temp);
    while(p)
    {
        Push(temp,p->data);
        p = p->next;
    }
    ListTraverse(temp);
}

int main()
{
    return 0;
}