NetNews Offline 2/NetNews Offline Volume 2.iso/news/comp/lang/c-part1/2266

Internet Message Format | 1996-08-05 | 727 b

Path: ratty.wolfe.net!neus
From: [e-mail] (Bill Campbell)
Newsgroups: comp.lang.c
Subject: why is this an infinite loop?
Date: 19 Jan 1996 23:33:57 GMT
Organization: Wolfe Internet Access, L.L.C.
Message-ID: <4dp9p5$[e-mail]>
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Beginning c student can't figure out why this small function  to read in a
value for the variable x causes an infinite loop when it receives unexpected
input.

double get_x()
{
 int test;
 double x;

 printf("Enter a numeric value for x: ");

 while(scanf("%lf", &x) != 1)
  {
   printf("ERROR - program expecting a number");
   printf("Enter a numeric value for x: ");
  }

 return x;
}