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`fputs'--write a character string in a file or stream

     #include <stdio.h>
     int fputs(const char *S, FILE *FP);
`fputs' writes the string at S (but without the trailing null) to the
file or stream identified by FP.
If successful, the result is `0'; otherwise, the result is `EOF'.
ANSI C requires `fputs', but does not specify that the result on
success must be `0'; any non-negative value is permitted.
   Supporting OS subroutines required: `close', `fstat', `isatty',
`lseek', `read', `sbrk', `write'.