example.cc

这是一个从音频信号里提取特征参量的程序

// file: $isip/doc/examples/class/math/scalar/math_scalar_example_00/example.cc
// version: $Id: example.cc,v 1.3 2000/12/17 18:17:44 hamaker Exp $
//

// isip include files
//
#include <Long.h>
#include <Float.h>
#include <Console.h>

// main program starts here
//  this example shows how classes and operators can be used in place of
//  integral types
//
int main() {
  
  // declare some objects
  //
  Long a(2);
  Float b(2.0), c(3.5), d(3.0);
  Float e;
  
  // perform a simple math operation:
  //  note that, due to precedence, the addition will take place
  //  last. Since the variable 'a' is a Long object, the result of
  //  (b * c) / d will be truncated before addition. 
  //
  e = a + (b * c) / d;
  
  // output the value
  //
  e.debug(L"a + (b * c) / d");

  // perform the same operation with all floating point numbers:
  //  this time, since 'f' is a Float object, the result will not
  //  be truncated before addition
  //
  Float f(2);
  Float g;

  g = f + (b * c) / d;

  // output the value
  //
  g.debug(L"f + (b * c) / d");

  // exit gracefully
  //
  Integral::exit();
}