{

Strategy * s1 = new ConcreteStrategyA();

Context * cxt = new Context();

cxt->setStrategy(s1);

cxt->algorithm();

Strategy *s2 = new ConcreteStrategyB();

cxt->setStrategy(s2);

cxt->algorithm();

delete s1;

delete s2;

int rac1 = 0x1;

int rac2 = 0x2;

int rac3 = 0x4;

int rac4 = 0x8;

int i = 0xe;

int j = 0x5;

int r1 = i & rac1;

int r2 = i & rac2;

int r3 = i & rac3;

int r4 = i & rac4;

cout <<"res:" << r1 << "/" << r2 << "/" << r3 << "/" << r4 << endl;

return 0;