fig05_18.cpp

来自「how to program的书籍源码」· C++ 代码 · 共 45 行

// Fig. 5.18: fig05_18.cpp
// Logical operators.
#include <iostream>
using std::cout;
using std::endl;
using std::boolalpha; // causes bool values to print as "true" or "false"

int main()
{
   // create truth table for && (logical AND) operator
   cout << boolalpha << "Logical AND (&&)"
      << "\nfalse && false: " << ( !true )
      << "\nfalse && true: " << ( false && true )
      << "\ntrue && false: " << ( true && false )
      << "\ntrue && true: " << ( true && true ) << "\n\n";

   // create truth table for || (logical OR) operator
   cout << "Logical OR (||)"
      << "\nfalse || false: " << ( false || false )
      << "\nfalse || true: " << ( false || true )
      << "\ntrue || false: " << ( true || false )
      << "\ntrue || true: " << ( true || true ) << "\n\n";

   // create truth table for ! (logical negation) operator
   cout << "Logical NOT (!)"
      << "\n!false: " << ( !false )
      << "\n!true: " << ( !true ) << endl;
   return 0; // indicate successful termination
} // end main

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