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Text File  |  1979-12-31  |  256b  |  9 lines
  1. #include stdio.h
  2. /*
  3. **  check if digit
  4. **  return 1 if true else 0
  5. */
  6. isdigit(c) char c; {
  7.   return((c>='0') & (c<='9'));
  8.   }
  9.