27 lines
325 B
C++
27 lines
325 B
C++
#include "nr.h"
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void NR::shell(const int m, Vec_IO_DP &a)
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{
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int i,j,inc;
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DP v;
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inc=1;
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do {
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inc *= 3;
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inc++;
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} while (inc <= m);
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do {
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inc /= 3;
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for (i=inc;i<m;i++) {
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v=a[i];
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j=i;
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while (a[j-inc] > v) {
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a[j]=a[j-inc];
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j -= inc;
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if (j < inc) break;
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}
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a[j]=v;
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}
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} while (inc > 1);
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}
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