class CountWheat {
public static void main (String args[]) {
int i, j, k;
j = 1;
k = 0;
for (i=1; i <= 64; i++) {
k += j;
if (k <= 0) {
System.out.println("Error: Overflow");
break;
}
System.out.print(k + "\t ");
if (i%4 == 0) System.out.println();
j *= 2;
}
System.out.println("All done!");
}
}
Here's the output:
% java CountWheat 1 3 7 15 31 63 127 255 511 1023 2047 4095 8191 16383 32767 65535 131071 262143 524287 1048575 2097151 4194303 8388607 16777215 33554431 67108863 134217727 268435455 536870911 1073741823 2147483647 Error: Overflow All done!