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barfoo (a) { return (a << 16) & ~0xffff; } foobar (a) { return ((unsigned short) a) << 15;} foo (a) { return (a & 0x121) << 31; } bar (a) { return (a & ~0xffff) << 16; } main () { int a; for (a = 1; a; a += a) { printf ("%d", (foo (a))); } puts (""); }