math_client.c

linux 高级编程的例子源码,包括了本书上的所有代码

/*
 * This is sample code generated by rpcgen.
 * These are only templates and you can use them
 * as a guideline for developing your own functions.
 */

#include "math.h"

void
math_prog_2(char *host)
{
	CLIENT *clnt;
	struct MATH  *result_1;
	struct MATH  math_proc_2_arg;
    char c;

	printf("choose the operate:\n\t0---ADD\n\t1---SUB\n\t2---MUL\n\t3---DIV\n");

    c=getchar();
    switch ( c )
    {
      case '0':
         math_proc_2_arg.op=ADD;
         break;
      case '1':
         math_proc_2_arg.op=SUB;
         break;
      case '2':
         math_proc_2_arg.op=MUL;
         break;
      case '3':
         math_proc_2_arg.op=DIV;
         break;
      default :
         printf("error :operate\n");
         exit(1);
    }
   
    printf("Input the first number: ");
    scanf("%f",&math_proc_2_arg.arg1);
   
    printf("Input the second number: ");
    scanf("%f",&math_proc_2_arg.arg2);
#ifndef	DEBUG
	clnt = clnt_create (host, MATH_PROG, MATH_VER, "udp");
	if (clnt == NULL) {
		clnt_pcreateerror (host);
		exit (1);
	}
#endif	/* DEBUG */

	result_1 = math_proc_2(&math_proc_2_arg, clnt);
	if (result_1 == (struct MATH *) NULL) {
		clnt_perror (clnt, "call failed");
	}
#ifndef	DEBUG
	clnt_destroy (clnt);
#endif	 /* DEBUG */

	printf("The Result is %.3f \n",result_1->result);

}


int
main (int argc, char *argv[])
{
	char *host;

	if (argc < 2) {
		printf ("usage: %s server_host\n", argv[0]);
		exit (1);
	}
    
	strcpy(hostname,argv[1]);

	host = argv[1];
	math_prog_2 (host);
    exit (0);
}