C++，利用链式栈实现括号匹配，界面友好，操作方便，运行流畅

#include<iostream>
#include<string>
using namespace std;

struct Node
{
char ch;
Node* next;
Node(char c, Node* p){ ch = c; next = p; }
};

void main()
{
string str;
bool flag = true;
while (flag)
{
cout << "请输入算术表达式：" << endl;
getline(cin, str);
int len = str.length();
Node* top = NULL;
int i;
for (i = 0; i < len; i++)
{
if (str[i] == '(' || str[i] == '[' || str[i] == '{')
{
top = new Node(str[i], top);
}
if (str[i] == ')' || str[i] == ']' || str[i] == '}')
{
if (top == NULL){ cout << "1.括号不匹配！" << endl; break; }
else
{
Node* pt = top;
top = top->next;
pt->next = NULL;
char item = pt->ch;
delete pt;
if ((item == '('&&str[i] != ')') || (item == '['&&str[i] != ']') || (item == '{'&&str[i] != '}'))
{
cout << "2.括号不匹配！" << endl; break;
}
}
}
}
if (i == len)
{
if (top){ cout << "3.括号不匹配！" << endl; }
else cout << "括号完全匹配！" << endl;
}
if (top)
{
Node* ptr;
while (top)
{
ptr = top->next;
delete top;
top = ptr;
}
}
cout << "是否继续？继续请按1，退出请按0：" << endl;
int choice;
cin >> choice;
getchar();
if (choice == 0)flag = false;
}
}

代码已经过测试，在VS2013上成功运行！

发此文有两大目的：

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