Hey monks!
I was coding a little program in C and i got stuck on something.
#include <stdio.h>

int main() {
    char answer=' ';
    
    printf("(F)irst,(S)econd,(T)hird\n");
    
    scanf("%c",&answer);

    while(answer !='F' && answer !='S'  && answer !='T') {
        printf("(F)irst,(S)econd,(T)hird\n");
    
        scanf("%c",&answer);
    }

    return 0;
}

[download]
If I enter something different than F,S or T , I get the message "(F)irst,(S)econd,(T)hird" printed more than it should.
I ran the code in gdb and the scanf line is skipped once before it's executed.In perl ,the code : 
my $ans;

print "(F)irst,(S)econd,(T)hird\n";

chomp($ans=<STDIN>);


while($ans ne 'F' && $ans ne 'S' && $ans ne 'T') {
    print "(F)irst,(S)econd,(T)hird\n";
    chomp($ans=<STDIN>);
}

[download]
runs just fine .
I'm guessing it's something about buffering , but I'm not sure.

In reply to Why does perl get this right and C doesn't ? by Alien

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