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16 lines
342 B
Fortran
16 lines
342 B
Fortran
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subroutine n2grid(n,grid)
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character*4 grid
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character*1 c1,c2
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if(n.gt.-31 .or. n.lt.-70) stop 'Error in n2grid'
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i=-(n+31) !NB: 0 <= i <= 39
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i1=i/10
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i2=mod(i,10)
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grid(1:1)=char(ichar('A')+i1)
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grid(2:2)='A'
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grid(3:3)=char(ichar('0')+i2)
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grid(4:4)='0'
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return
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end subroutine n2grid
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