read char from console
This is because scanf
leaves the newline you type in the input stream. Try
do
c = getchar();
while (isspace(c));
instead of
c = getchar();
Call fflush(stdin);
after scanf
to discard any unnecessary chars (like \r \n) from input buffer that were left by scanf
.
Edit: As guys in comments mentioned fflush
solution could have portability issue, so here is my second proposal. Do not use scanf
at all and do this work using combination of fgets
and sscanf
. This is much safer and simpler approach, because allow handling wrong input situations.
int x,y;
char c;
char buffer[80];
printf("x:\n");
if (NULL == fgets(buffer, 80, stdin) || 1 != sscanf(buffer, "%d", &x))
{
printf("wrong input");
}
printf("y:\n");
if (NULL == fgets(buffer, 80, stdin) || 1 != sscanf(buffer, "%d", &y))
{
printf("wrong input");
}
c = getchar();