From: "Jason Yip" <manman AT netteens DOT net>
Newsgroups: comp.os.msdos.djgpp
Subject: Answer right and then wrong...
Date: Tue, 7 Dec 1999 12:09:13 +0800
Organization: netteens.net (Hongkong Telecom IMS)
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

I input a wrong ans in my prog... it shows "no try again", and then I input
a correct ans, it shows "very good" AND "no try again".. that means I can't
get a correct ans when the 1st time I did wrong...
What's more, I can't quite the prog when I enter "-1".. it shows the answer
is wrong when I enter "-1"..
Can anyone helps? Thank you!!

main ()
{
int ans,h,a,b;
printf("Enter -1 to end\n");
do{
srand(time(NULL));
a=1+(rand()%9);
b=1+(rand()%9);
printf("How much is %d times %d? ",a,b);
ans=a*b;
scanf("%d",&h);
        if (ans == h)
 printf("Very Good!\n");
        else
        if (ans!=h){
 do{{
        printf("No. Please try again.\n");
        printf("? ");
 scanf("%d",&h);}
 if (ans == h)
 printf("Very Good!\n");} while (ans != h, ans != -1);
        }} while (ans != -1);
 if (ans == -1)
 printf("That's all for now. Bye.");
return 0;
}