2025-linuxdays/swrange.c


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#include <stdio.h>

int main(int argc, char *argv[]) {
  int val = getchar();
  switch (val) {
  case '0' ... '9':
    printf("Number\n");
	break;
  default:
    printf("Not a number\n");
    break;
  }
  return 0;
}