//---------------------------
// lab8.cpp
// Author: Grant Bivens
// Class: EET 2303 C++
// Professor: Dr. Imad Abouzahr
// Date: 4-4-06
// This program generates a table of values at specific times along a sine waveform.
//---------------------------

#include <stdio.h>
#include <stdlib.h>
#include <cmath>	// includes
#include <iostream>
#include <iomanip>
using std::cout;
using std::cin;		// using standards.
using std::endl;
using std::setw;
 
const float pi = 3.1415; //set pi as a constant so "pi" can be used instead of 3.141...

// initalize function CalcWaveform 
void CalcWaveform ( double Waveform, int size, double frequency, double deltat, double amplitude );
 
int main() //begin main function
{
   int wavesize; // initalize wavesize as integer
   double duration, deltat, amplitude, frequency; // initalized as double
 
   cout << "\nEnter duration"; // get duration
   cin >> duration;
 
   cout << "\nEnter Delta t"; // get delta t
   cin >> deltat;
 
   cout << "\nEnter wave amplitude"; // get amplitude
   cin >> amplitude;
 
   cout << "\nEnter wave frequency"; // get frequency
   cin >> frequency;
 
   wavesize = static_cast <int> ( duration / deltat ); //set size of wavesize
   double Waveform []; // initalize Waveform array
   for (int i = 0; i < wavesize; i++) //loop
   Waveform [ i ] = 0.0; // initalize array to 0
 
   // call function
   CalcWaveform (Waveform , wavesize, frequency, deltat, amplitude);
   cout << "\nTime" << setw ( 13 ) << "Sine" << endl; // display header text
 
   // loop to fill waveform array
   for ( int h = 0; h < wavesize; h++ ) 
   cout << setw ( 7 ) << h * deltat << setw ( 13 ) << Waveform [ h ] << endl; 
system ( "pause" );
return 0;
}

//start CalcWaveform function 
void CalcWaveform ( double Waveform, int size, double frequency, double deltat, double amplitude )
{
   int i; //initialize i
 
   for ( int i = 0; i < size; i++ ) // counter
 
   Waveform [ i ] = amplitude * sin ( 2 * pi * frequency * i * deltat ); // calculates
   cout << Waveform [ i ] << endl; // prints array results
}