#include <ansi_c.h>#define PI  3.1415926  //wave data generation functionvoid GenerateWave (int shape,double datapoints[100],double wavepeak){    int i;	double wavemax=wavepeak/2.0;    switch (shape) {        case 1 :                /* Sinewave */            for (i=0;i<100;i++)                datapoints[i] = wavemax * sin((((2.0*PI)/100.0) * i)) + 50.0;            break;        case 2 :               /* Square wave */            for (i=0;i<33;i++)                datapoints[i] = 50.0-wavemax;            for (i=33;i<67;i++)                datapoints[i] = 50.0+wavemax;            for (i=67;i<100;i++)                datapoints[i] = 50.0-wavemax;            break;        case 3 :               /* Triangle wave */            for (i=0;i<25;i++) {                datapoints[i] = i*4*wavepeak/100+50-wavemax;                datapoints[i+25] = wavepeak - (i*4)*wavepeak/100+50-wavemax;                datapoints[i+50] = i*4*wavepeak/100+50-wavemax;                datapoints[i+75] = wavepeak - (i*4)*wavepeak/100+50-wavemax;                }            break;        case 4 :               /* Random data */            for (i=0;i<100;i++)                datapoints[i] = rand()/32767.0 * wavepeak+50-wavemax;            break;        }}