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Language in C Interview Questions and Answers

Ques. Can we get the process identification number of the current program?

Ans. Yes! The macro getpid( ) gives us the process identification number of the program currently running. The process id. uniquely identifies a program. Under DOS, the getpid( ) returns the Program Segment Prefix as the process id. Following program illustrates the use of this macro.
#include <stdio.h>
#include <process.h>

void main( )
{
printf ( "The process identification number of this program is %X\n",
getpid( ) ) ;
}

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