Need help with "a multi-threaded program using POSIX thread library"

[Gordack]

Guys, sorry i couldnt write any code because i have no idea.
This is my homework and i must do it.
Can u say any tips or show example codes ?
In anyhelp , i will be glad. Thanks.

The program has three threads. All threads share an array A of n integers, where n is a command line parameter.
The main thread of the program initially fills the array with random integers in the range 1…n and creates two search threads.
The search threads run the same function

search(int A[], int size, char direction, int target)

The function searches half of the array for the target and prints the indices where it is found. Target is also a command line parameter.

A typical run of the program is as follows:

./a.out 12 4
thread 1: found 4 at index 0
thread 2: found 4 at index 10
thread 2: found 4 at index 8
thread 1: found 4 at index 5