#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>

int create_socket(int );

main(int argc, char** argv) {
	int i, connection, port, descriptor;
	int size;
	float factor1, factor2, product;

/*****************************************************************/

/* Check command line arguments */

        if(argc != 3) {
                printf("Usage: my_server -p # \n");
                printf("        where -p # is port number\n");
                exit(0);
        }

/* Get the argument after -p and assign it to port */

        for( i = 0; i < argc; i++) {
                if( !strcmp(*(argv + i), "-p")) {
                        port = (int) atoi( *(argv+i+1));
                }
        }

/* Make the socket and connection */

	descriptor = create_socket(port);
	if(descriptor == 0) {
		printf("failed to make a socket\n");
		exit(0);
	}

/*****************************************************************/

	connection = 1;
        while(connection != 0) {
                i = read(descriptor, (char*) &connection, sizeof(int));
		printf("I have just read %d bytes representing %d\n",i,connection);
                if(connection == 0) {
                        printf("I have been told my services are no longer needed\n");
                } else {
                        i = read(descriptor, (char *) &factor1, sizeof(float));
			printf("I have just read %d bytes representing %f\n",i,factor1);
                        i = read(descriptor, (char *) &factor2, sizeof(float));
			printf("I have just read %d bytes representing %f\n",i,factor2);
                        product = factor1 * factor2;
                        i = write(descriptor, (char *) &product, sizeof(float));
			printf("I have just WRITTEN %d bytes representing %f\n",i,product);
		
                }
        }
	close(descriptor);
        printf("Goodbye now\n");          
}