int main(void) {
//---------------- 1 ------------------
int pos = 1;
int count = 3;
int i;
for(i = 0; i < count; i++) // caluculate 2^n
pos *= 2;
printf("Code1: pos = %d\n", pos);
//---------------- 2 ------------------
pos = 1;
count = 3;
pos = pos << count;
printf("Code2: pos = %d\n", pos);
return 0;
}