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/**
* Ö±½Ó²åÈëÅÅÐò,Ê×ÏȱȽÏa[n]Óëa[n-1]£¬ÔڱȽÏa[n]Óëa[n-2]
* */
public void sort0(double[] a){
for(int i = 0; i < a.length -1; i ++){
double tmp = a[i + 1];
int j = i;
while(j >= 0 && tmp <= a[j]){
a[j+1] = a[j];
j --;
}
a[j+1] = tmp;
}
}
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