/* *	pulse.c * *	Version 2.6 by Steve Sampson, Public Domain, November 1988 * *	This program is used to generate time domain pulse data	for fft.c. */#include <stdio.h>#include <alloc.h>#define SAMPLES	256double	Sample, Pw, Time, Real[SAMPLES], Imag[SAMPLES];FILE	*Fp;main(argc, argv)int	argc;char	**argv;{	register int	loop;	if (argc != 2)  {		fprintf(stderr,"Usage: pulse output_file\n");		exit(1);	}	printf("Input The Pulse Width (Seconds) ? ");	scanf("%lf", &Pw);	printf("Input The Sampling Time (Seconds) ? ");	scanf("%lf", &Sample);	Time = 0.0;	for (loop = 0; loop < SAMPLES; loop++)  {		if (Time < Pw)			Real[loop] = 1.0;		else			Real[loop] = 0.0;		Imag[loop] = 0.0;		Time += Sample;	}	if ((Fp = fopen(*++argv, "wb")) == NULL)  {		fprintf(stderr,"pulse: Unable to create write file\n");		exit(1);	}	fwrite(Real, sizeof(double), SAMPLES, Fp);	fwrite(Imag, sizeof(double), SAMPLES, Fp);	fclose(Fp);	putchar('\n');	exit(0);}