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'This example uses the CALL and CALLS statements to pass a BASIC array to a
'C function.
 
'NOTE: To run this program, you must separately compile the C function with
'the medium-model (/AM) switch and place the object module in a Quick library
'or link it to the BASIC main program.
 
DEFINT A-Z
 
DECLARE SUB AddArr CDECL (SEG Array, SEG Num)
 
DIM a(1 TO 100) AS INTEGER
'Fill the array with the numbers 1 to N.
N = 15
FOR I = 1 TO N
    A(I) = I
NEXT I
 
'Call the C function using CALLS the first time
'and increment all array elements by 1.
CALLS AddArr(a(1), N)
 
'Call the same C function again using CALL and
'increment all array elements by 1.
CALL AddArr(a(1),N)
 
'Print the modified array. All elements will be incremented
'by a total of two. For example, what was 1 will now be 3.
FOR I = 1 TO N
   PRINT A(I),
NEXT I
END
 
'C Function addarr.
'
'/* Add one to the first num elements of array arr.*/
'void far addarr(arr,num)
'int far *arr;
'int far *num;
'{
'   int i;
'   for(i=0;i<*num;i++) arr[i]++;
'}