isdigitch
if (nextarg == NULL || *nextarg == '-' || isdigitch(*nextarg))
if (isdigitch(*cp)) {
while (cp >= origval && (*cp == ',' || isdigitch(*cp)))
if (!isdigitch(**argv))
if (!isdigitch(*numstr))
for (cp = numstr; (cp < numstr + 5) && isdigitch(*cp); cp++)
while(isdigitch(*cp))
for (cp = numstr; (cp < numstr + 3) && isdigitch(*cp); cp++)
if (islowerch(*cp) || isdigitch(*cp))
if (isdigitch(*lhside)) {
if (isdigitch(*rhside))
} else if (isdigitch(*rhside)) {
if (isdigitch(*lhside))
if (isdigitch(*rhside))
if ((*numstr == '-') && (isdigitch(*(numstr + 1)))) {
if (isdigitch(*q)) {
if (isdigitch(last_digit))
if (!isdigitch(*string++))