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changes #2

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2 changes: 2 additions & 0 deletions README.md
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# SEMAPHORE
# PROCESS

a semaphore is a variable or abstract data type used to control access to a common resource by multiple processes in a concurrent system such as a multitasking operating system
1 change: 1 addition & 0 deletions semaphore.c
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#include<sys/ipc.h>
#include<sys/sem.h>
#include<error.h>
//program for semaphore creation
main()
{
int sid,val,val1;
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