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francois |
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/***************************************************************** |
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trirea.c Type:Func |
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tri d un tableau dans le sens croissant |
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Vient de Alain RASSINEUX |
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*****************************************************************/ |
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#include <stdio.h> |
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void trirea(float *a,int *la,int *ir) |
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{ |
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int iu[21], il[21], i, m, j, k, ij, l, itt, it ; |
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float t, tt, r ; |
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if (*la<=0) return ; |
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m = 1 ; |
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i = 1 ; |
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j = *la ; |
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r = 0.375 ; |
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lab5 : |
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if (i==j) goto lab45 ; |
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if (r>0.5898437) goto lab10 ; |
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r = r + 3.90625e-2 ; |
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goto lab15 ; |
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lab10 : |
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r = r - 0.21875 ; |
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lab15 : |
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k = i ; |
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ij = i+(j-i)*r ; |
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t = a[ij-1] ; |
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it = ir[ij-1] ; |
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if (a[i-1]<=t) goto lab20 ; |
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a[ij-1] = a[i-1] ; |
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a[i-1] = t ; |
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t = a[ij-1] ; |
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ir[ij-1] = ir[i-1] ; |
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ir[i-1] = it ; |
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it = ir[ij-1] ; |
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lab20 : |
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l = j ; |
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if (a[j-1]>=t) goto lab30 ; |
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a[ij-1] = a[j-1] ; |
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a[j-1] = t ; |
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t = a[ij-1] ; |
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ir[ij-1] = ir[j-1] ; |
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ir[j-1] = it ; |
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it = ir[ij-1] ; |
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if (a[i-1]<=t) goto lab30 ; |
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a[ij-1] = a[i-1] ; |
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a[i-1] = t ; |
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t = a[ij-1] ; |
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ir[ij-1] = ir[i-1] ; |
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ir[i-1] = it ; |
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// it = ir[ij-1] ; |
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goto lab30 ; |
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lab25 : |
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if (a[l-1]==a[k-1]) goto lab30 ; |
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tt = a[l-1] ; |
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a[l-1] = a[k-1] ; |
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a[k-1] = tt ; |
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itt = ir[l-1] ; |
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ir[l-1] = ir[k-1] ; |
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ir[k-1] = itt ; |
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lab30 : |
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l = l-1 ; |
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if (a[l-1]>t) goto lab30 ; ; |
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lab35 : |
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k = k+1 ; |
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if (a[k-1]<t) goto lab35 ; |
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if (k<=l) goto lab25 ; |
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if ((l-i)<=(j-k)) goto lab40 ; |
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il[m-1] = i ; |
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iu[m-1] = l ; |
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i = k ; |
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m = m+1 ; |
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goto lab50 ; |
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lab40 : |
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il[m-1] = k ; |
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iu[m-1] = j ; |
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j = l ; |
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m = m+1 ; |
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goto lab50 ; |
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lab45 : |
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m = m-1 ; |
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if (m==0) return ; |
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i = il[m-1] ; |
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j = iu[m-1] ; |
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lab50 : |
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if ((j-i)>=11) goto lab15 ; |
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if (i==1) goto lab5 ; |
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i = i-1 ; ; |
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lab55 : |
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i = i+1 ; |
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if (i==j) goto lab45 ; |
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t = a[i] ; |
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it = ir[i] ; |
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if (a[i-1]<=t) goto lab55 ; |
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k = i ; |
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lab60 : |
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a[k] = a[k-1] ; |
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ir[k] = ir[k-1] ; |
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k = k-1 ; |
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if (t<a[k-1]) goto lab60 ; |
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a[k] = t ; |
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ir[k] = it ; |
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goto lab55 ; |
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} |
