How to Change REAL*4 Numbers to REAL*8 Values in Debugger

• Microsoft Fortran PowerStation for Windows 95 and Windows NT, version 4.0

SUMMARY

When you want to change a REAL*8 variable's single-precision value in the debugger to a number greater than the maximum positive or negative value allowed for single-precision numbers, you must use the "D" exponent descriptor.

MORE INFORMATION

All REAL variables are initially expressed with the single-precision "E" exponent descriptor in the debugger. To change the value of a REAL*8 variable containing a single-precision number to a double-precision number, increase the size of the exponent, and change the "E" exponent descriptor to the "D" exponent descriptor.

Step-by-Step Example

1. Build the following sample code in Developer Studio.



2. In Developer Studio, click Debug on the Build menu, and then click Step Into to begin the debugging process.



3. In the locals window, double-click the value associated with the Single variable. Replace the exponent part with "D+039" and press the ENTER key. This changes the value to a double-precision number.

Sample Code

C Compile options needed: /Zi

      real*8 Single

      Single = 3.40E+38

      end 

Additional query words: kbinf 4.00

Keywords : kbFortranPS kbLangFortran
Version : :4.0
Platform : NT WINDOWS
Issue type :