scanf ignoring, infinite loop

Question

int flag = 0;
int price = 0;
while (flag==0)
{
    printf(\"\\nEnter Product price: \");
    scanf(\"%d\",&price);
    if (price==0) 
        printf(\"input not          


        

Answer 1

The "answers" that say it will because there is a '\n' in the buffer are mistaken -- scanf("%d", ...) skips white space, including newlines.

It goes into an infinite loop if x contains 0 and scanf encounters a non-number (not just whitespace) or EOF because x will stay 0 and there's no way for it to become otherwise. This should be clear from just looking at your code and thinking about what it will do in that case.