main.cpp

来自「数据结构与程序设计教材源码 数据结构与程序设计教材源码」· C++ 代码 · 共 32 行

 
#include "../../C/UTILITY.H"
#include <string.h>
#include "POLISH.H"
#include "POLISH.CPP"
 
main()
{
   Expression e;
   Token t;
   Value x = 0;
   cout << "Enter an infix (integer and operator) expression.\n" 
        << "It will be translated to postfix and evaluated." << endl
        << "Use a symbol $ to terminate input." << endl;

   e.read();
   cout << "Your input expression is: ";
   e.dump();

   Expression f = e.infix_to_postfix();
   cout << "Its postfix form is: ";
   f.dump();

   if (f.evaluate_postfix(x) == fail) cout << "FAIL!\n";
   cout << "With value: " << x << endl;
   while (true) {
      f.get_token(t);
      if (t.kind() == end_expression) break;
      else cout << t.value << endl;
   }
}