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/*
* sample "simulation" program which outputs results (x y values) on
* a socket, which will be read by the program m_WatchSocket. See also
* watchsocket.c
*/
#include <dx/dx.h>
#include <stdio.h>
#include <math.h>
extern Error CreateSocket(int *, short);
main(argc, argv)
int argc;
char *argv[];
{
int fd;
float a, b, c, d, stepsize, i;
int numbytes_data;
int written;
short port = 2000;
float x, y, buffer[2], start, end;
char *message;
start = 0;
end = 100;
/*
* grab the parameters off of the command line and convert to
* floating point numbers
*/
a = atof(argv[1]);
b = atof(argv[2]);
c = atof(argv[3]);
d = atof(argv[4]);
stepsize = atof(argv[5]);
/* set up the socket */
if (!CreateSocket(&fd, port)) {
message = DXGetErrorMessage();
fprintf(stderr,message);
exit(0);
}
/*
* number of bytes written each time for the data
* (two floating point numbers)
*/
numbytes_data = 2*(sizeof(float));
/* run the simulation */
for (i=start; i< end; i+=stepsize) {
x = sin(a*i + c);
y = sin(b*i + d);
buffer[0] = x;
buffer[1] = y;
written = write(fd, buffer, numbytes_data);
if (written < 0) {
fprintf(stderr,"failure to write to socket\n");
exit(0);
}
/* sleep for one second */
sleep(1);
}
/* close the socket */
close(fd);
}
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