double array inside function

When I use compile this I get the error message:

error: invalid use of array with unspecified bounds


for each line in the void fucntion, referring to the lines, i get this duplicate error message

        tester[1][1]=1;
        tester[1][2]=2;
        tester[2][1]=3;
        tester[2][2]=4;


Here is the sample code:

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

void junk( int tester[ ][ ]  );

main()
{
        int tester[2][2];
        junk(tester);


}
void junk( int tester[ ][ ]  )
{
        tester[1][1]=1;
        tester[1][2]=2;
        tester[2][1]=3;
        tester[2][2]=4;
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