C/C++ Interactive Guide/c-cplusplus-interactive-guide.iso/c_ref/csource4/221_01/isdigit.c

C/C++ Source or Header | 1979-12-31 | 256 b | 9 lines

#include stdio.h
/*
**  check if digit
**  return 1 if true else 0
*/
isdigit(c) char c; {
  return((c>='0') & (c<='9'));
  }