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Language in C Interview Questions and Answers

Ques. Compare FP_SEG And FP_OFF.
Ans. Sometimes while working with far pointers we need to break a far address into its segment and offset. In such situations we can use FP_SEG and FP_OFF macros. Following program illustrates the use of these two macros.

main( )
unsigned s, o ;
char far *ptr = "Hello!" ;

s = FP_SEG ( ptr ) ;
o = FP_OFF ( ptr ) ;
printf ( "\n%u %u", s, o ) ;

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