FIX: F6100 Reading Maximal Negative IntegersLast reviewed: September 16, 1997Article ID: Q104896 |
1.00 1.00a | 1.00
MS-DOS | WINDOWS NTkbprg kbfixlist kberrmsg The information in this article applies to:
SYMPTOMSFor any integer data type, reading the smallest negative integer of that range generates the run-time error F6100 indicating that there was an INTEGER overflow on input.
STATUSMicrosoft has confirmed this to be a problem in the Microsoft products listed at the beginning of this article. This problem was corrected in Microsoft FORTRAN PowerStation 32, version 4.0.
MORE INFORMATIONThe smallest negative integer for each integer data type is:
-128 Integer*1 -32768 Integer*2 -2147483648 Integer*4The sample code below generates the 6100 error for all integer types when compiled with PowerStation, but only generates the 6100 error for integer*4 with FORTRAN 5.1 and earlier.
Sample CodeC No Compiler options needed integer*1 i integer*2 j integer*4 k open(1,file='test.dat') do 10 n=3,5 write(1,*) -2**((2**n-1)) 10 continue rewind(1) read(1,*,iostat=ierr) i if(ierr.eq.6100) then print*, 'error reading integer*1 was: ',ierr else print*, 'integer*1 input: ',i end if read(1,*,iostat=ierr) j if(ierr.eq.6100) then print*, 'error reading integer*2 was: ',ierr else print*, 'integer*2 input: ',j end if read(1,*,iostat=ierr) k if(ierr.eq.6100) then print*, 'error reading integer*4 was: ',ierr else print*, 'integer*4 input: ',k end if end |
Additional reference words: 1.00 5.10
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