getbinblocksize(a)

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#include <iostream> using namespace std; #define B_SHIFT         4   int getBinBlockSize(int size) {       int q = 0;     for ( q= 0; size>0; size >>= 1)     {         q++;     }       return 1 << q; } static int    getBinBlockSize2(int size) {     int    q;       size = size >> B_SHIFT;     for (q = 0; size; size >>= 1) {         q++;     }     return (1 << (B_SHIFT + q)); } int _tmain(int argc, _TCHAR* argv[]) {     int a;     cout << "please input a positive integer:";     cin >> a;     cout << getBinBlockSize2(a) << endl;     system("PAUSE");     return 0; }