#include<iostream>
#include<string>
#include<stack>
#include<list>
using namespace std;
class getstring
{
public:list <string> istream;
stack<string> label;
bool flag;
list<string>::iterator getite(int i)
{
int j = 0;
list<string>::iterator it1 = istream.begin();
while (j != i)
{
j++; it1++;
}
return it1;
}
void getis()
{
string s1, s2;
cout << "请输入表达式：" << endl;
cin >> s1;
for (int i = 0; i<s1.size(); i++)
{
if (s1[i] == '+' || s1[i] == '*' || s1[i] == '(' || s1[i] == ')')
{
s2.push_back(s1[i]); istream.push_back(s2); s2.clear();
}
else if (s1[i] == 'i')
{
s2.push_back(s1[i]); i++;
if (s1[i] == 'd') { s2.push_back(s1[i]); istream.push_back(s2); s2.clear(); }
else { error(); }
}
else if (s1[i] == '\0')
{
continue;
}
else
{
error();
}
}
istream.push_back("$"); flag = false;
}
void error()
{
cout << "错误！" << endl;
exit(0);
}
void test()
{
if (label.empty() || istream.empty()) { exit(0); }
}
void gototable(string s1, string s2)
{
if (s1 == "0"&&s2 == "E")
