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─────Run-Time Library───────────────────────────────────────────────────────
 
     The fputc function writes the single character <c> to the output
     stream at the current position. The _fputchar function is
     equivalent to fputc( <c>, stdout ). The fputc and _fputchar
     routines are similar to putc and putchar, but are functions rather
     than macros.
 
     Return Value
 
     The fputc and _fputchar functions return the character written. A
     return value of EOF indicates an error.
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