root / synthbench / euroben-dm / mod2b / idmax.f @ 0:839f52ef7657
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Function idmax( n, sx, incx ) Result( iiamax ) |
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! ---------------------------------------------------------------------- |
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Use numerics |
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Implicit None |
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|
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Real(l_) :: sx(*), smax, xmag |
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Integer :: i, ii, incx, n, ns, iiamax |
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! ---------------------------------------------------------------------- |
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iiamax = 0 |
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If ( n <= 0 ) Return |
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iiamax = 1 |
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If ( n <= 1 ) Return |
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If ( incx /= 1 ) Then |
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smax = Abs( sx(1) ) |
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ns = n*incx |
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ii = 1 |
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Do i=1,ns,incx |
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xmag = Abs( sx(i) ) |
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If ( xmag > smax ) Then |
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iiamax = ii |
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smax = xmag |
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End If |
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ii = ii + 1 |
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End Do |
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Return |
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End If |
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smax = Abs( sx(1) ) |
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Do i = 2, n |
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xmag = Abs( sx(i) ) |
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If ( xmag > smax ) Then |
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iiamax = i |
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smax = xmag |
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End If |
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End Do |
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! ---------------------------------------------------------------------- |
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End Function idmax |