Q. The value printed by the C program is ___________

#include <stdio.h>
int *A, stkTop;
int stkFunc (int opcode, int val)
{
static int size=0, stkTop=0;
switch (opcode)
{
case -1:
size = val;
break;
case 0:
if (stkTop < size ) A[stkTop++]=val;
break;
default:
if (stkTop) return A[--stkTop];
}
return -1;
}
int main()
{
int B[20];
A=B;
stkTop = -1;
stkFunc (-1, 10);
stkFunc (0, 5);
stkFunc (0, 10);
printf ("%dn", stkFunc(1, 0)+ stkFunc(1, 0));
}