C Tutorial/ctype.h/isblank
isblank
Item Value Header file ctype.h Declaration int isblank(int ch); Return returns nonzero if ch is blank. By default, the blank characters are space and horizontal tab.
#include <ctype.h>
#include <stdio.h>
int main(void)
{
char ch;
for(;;) {
ch = getchar();
if(ch == ".") {
break;
}
if(isblank(ch)){
printf("%c is a word separator\n", ch);
}
}
return 0;
}