logic.cpp

来自「一个在linux下的shell的计算器」· C++ 代码 · 共 52 行

/*
 *
 *
 *
 */

#include <iostream>
#include "logic.h"
#include "interpreter.h"

using namespace std;

//
//
//
void LoadLogic(ItemList & list)
{
 list.Add(new Operation(TRUE, "true", 0));
 list.Add(new Operation(FALSE, "false", 0));
 list.Add(new Operation(NOT, "not", 1));
 list.Add(new Operation(LT, "<", 2));
 list.Add(new Operation(GT, ">", 2));
 list.Add(new Operation(LE, "<=", 2));
 list.Add(new Operation(GE, ">=", 2));
 list.Add(new Operation(EQ, "==", 2));
 list.Add(new Operation(NE, "!=", 2));
 list.Add(new Operation(AND, "and", 2));
 list.Add(new Operation(OR, "or", 2));
 list.Add(new Operation(XOR, "xor", 2));
}

//
//
//
void LogicalHelp()
{
 cout << endl << "Logical operators: " << endl << endl;
 cout << "  true     True (truth value)." << endl;
 cout << "  false    False (truth value)." << endl;
 cout << "  <        Less than." << endl;
 cout << "  >        Greater than." << endl;
 cout << "  <=       Less or equal than." << endl;
 cout << "  >=       Greater or equal than." << endl;
 cout << "  ==       Equal." << endl;
 cout << "  !=       Not equal." << endl;
 cout << "  and      And." << endl;
 cout << "  or       Or." << endl;
 cout << "  xor      Exclusive Or." << endl;
 cout << "  not      Logical negation." << endl;
}