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char *s = "DEHLORW";
char *d = "2133464530";

for(i=0; d[i]; i++)
cout << s[d[i]-'0'];

///////////////////////////

i = 1<<1;
i |= 1;
cout << (i<<2) << ":" << (i>>2) << (i==2);

/////////////

x = 0;
cout << (x==0) << (x=0) << (0);

////////////////////////////

class c{
c(int i=0);
public: int a;
};

c::c(int i): a(i) {}

source