Four bit adder: Difference between revisions
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m (fixed a dumb mistake) |
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// not sure if the rules allow this, but we need to pad the values |
// not sure if the rules allow this, but we need to pad the values |
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// if they're too short and trim them if they're too long |
// if they're too short and trim them if they're too long |
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var inA = ( |
var inA = Array(4), |
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inB = ( |
inB = Array(4), |
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out = |
out = Array(4), |
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i = 4, |
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pass; |
pass; |
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while (i--) { |
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inA[i] = a[i] != 1 ? 0 : 1; |
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inB[i] = b[i] != 1 ? 0 : 1; |
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} |
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// now we can start adding... I'd prefer to do this in a loop, |
// now we can start adding... I'd prefer to do this in a loop, |
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pass = halfAdder(inA[3], inB[3]); |
pass = halfAdder(inA[3], inB[3]); |
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out = pass.sum |
out[3] = pass.sum; |
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pass = fullAdder(inA[2], inB[2], pass.carry); |
pass = fullAdder(inA[2], inB[2], pass.carry); |
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out = pass.sum |
out[2] = pass.sum; |
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pass = fullAdder(inA[1], inB[1], pass.carry); |
pass = fullAdder(inA[1], inB[1], pass.carry); |
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out = pass.sum |
out[1] = pass.sum; |
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pass = fullAdder(inA[0], inB[0], pass.carry); |
pass = fullAdder(inA[0], inB[0], pass.carry); |
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out = pass.sum |
out[0] = pass.sum; |
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return out; |
return out.join(''); |
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} |
} |
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</lang> |
</lang> |
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