9、栈的括号匹配

#include <iostream>

using namespace std;
#define MaxSize 10
typedef struct{
    char data[MaxSize];
    int top;
}SqStack;

void InitSqStack(SqStack &S);//初始化顺序栈
bool IsEmpty(SqStack S);//判断是否栈空
bool Push(SqStack &S,char x);//进栈操作
bool Pop(SqStack&S,char &x);//出栈
bool GetTop(SqStack S,char &x);//读取栈顶元素
int Length(SqStack S);//当前栈内元素个数
void Show(SqStack S);//打印栈内元素

bool BrackeMatching(char*string,int len);//括号匹配
void BrackeMatchingTest();//测试函数

int main()
{
    BrackeMatchingTest();


}

void InitSqStack(SqStack &S)//初始化顺序栈
{
    S.top=-1;
}
bool IsEmpty(SqStack S)//判断是否栈空
{
    return(S.top==-1);
}
bool Push(SqStack &S,char x)//进栈操作
{
    if(S.top==MaxSize-1)
        return false;
    S.data[++S.top]=x;
    return true;
}
bool Pop(SqStack&S,char &x)//出栈
{
    if(S.top==-1)return false;
    x=S.data[S.top--];
    return true;
}

bool GetTop(SqStack S,char &x)//读取栈顶元素
{
    if(S.top==-1)return false;
    x=S.data[S.top];return true;
}
int Length(SqStack S)//当前栈内元素个数
{
    return (S.top+1);
}

void Show(SqStack S)//打印栈内元素
{
    for(int i=0;i<=S.top;i++)
    {
        cout<<S.data[i]<<"_";
    }
    cout<<endl;

}

bool BrackeMatching(char*string,int len)//括号匹配
{
    char p,q;
    SqStack  S;
    InitSqStack(S);
    Push(S,'#');
    for(int i=0;i<len;i++)
    {
        p=string[i];
        switch(p)
        {
            case'(':
            case'{':
            case'[':
                Push(S,p);break;
            case')':
                Pop(S,q);
                if(q!='(')
                    return false;
                break;
            case'}':
                Pop(S,q);
                if(q!='{')
                    return false;
                break;
            case']':
                Pop(S,q);
                if(q!='[')
                    return false;
                break;
            default:break;
        }
    }
    Pop(S,q);
    if(q!='#')
        return false;
    return true;
}

void BrackeMatchingTest()//测试函数
{
    char*string="[2+(1-3)]*4";
    bool ans=BrackeMatching(string,17);
    printf("Is the expression '%s' bracket matching? %d \r\n", string, ans);


    string = "( )  )";
    ans=BrackeMatching(string,6);
    printf("Is the expression '%s' bracket matching? %d \r\n", string, ans);

    string= "()()(())";
    ans=BrackeMatching(string,8);
    printf("Is the expression '%s' bracket matching? %d \r\n", string, ans);


    string = "({}[])";
    ans=BrackeMatching(string,6);
    printf("Is the expression '%s' bracket matching? %d \r\n", string, ans);


    string = ")(";
    ans=BrackeMatching(string,6);
    printf("Is the expression '%s' bracket matching? %d \r\n", string, ans);


}

结果