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25 lines
477 B
C
25 lines
477 B
C
module binarydigits;
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import std::math;
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import std::io;
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fn void main()
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{
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for (int i = 0; i < 20; i++)
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{
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VarString s = bin(i);
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defer s.destroy();
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io::printf("%s\n", s);
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}
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}
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fn VarString bin(int x)
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{
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int bits = x == 0 ? 1 : 1 + (int)math::log2(x);
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VarString str;
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str.append_repeat('0', bits);
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for (int i = 0; i < bits; i++)
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{
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str.set((usz)(bits - i - 1), x & 1 ? '1' : '0');
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x >>= 1;
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}
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return str;
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} |