public class Binary {
public static void main(String[] args) {
// read in the command-line argument
int n = Integer.parseInt(args[0]);
// set v to the largest power of two that is <= n
int v = 1;
while (v <= n/2) {
v = v * 2;
}
// check for presence of powers of 2 in n, from largest to smallest
while (v > 0) {
// v is not present in n
if (n < v) {
System.out.print(0);
}
// v is present in n, so remove v from n
else {
System.out.print(1);
n = n - v;
}
// next smallest power of 2
v = v / 2;
}
System.out.println();
}
}
/*************************************************************************
* Prints out n in binary.
*
* % java Binary 5
* 101
*
* % java Binary 106
* 1101010
*
* % java Binary 0
* 0
*
* % java Binary 16
* 10000
*
* Limitations
* -----------
* Does not handle negative integers.
*
* Remarks
* -------
* could use Integer.toBinaryString(N) instead.
*
*************************************************************************/
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