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Debugging with GDB

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19.5 Numbers

You can always enter numbers in octal, decimal, or hexadecimal in GDB by the usual conventions: octal numbers begin with `0', decimal numbers end with `.', and hexadecimal numbers begin with `0x'. Numbers that begin with none of these are, by default, entered in base 10; likewise, the default display for numbers--when no particular format is specified--is base 10. You can change the default base for both input and output with the set radix command.

set input-radix base
Set the default base for numeric input. Supported choices for base are decimal 8, 10, or 16. base must itself be specified either unambiguously or using the current default radix; for example, any of

 
set radix 012
set radix 10.
set radix 0xa

sets the base to decimal. On the other hand, `set radix 10' leaves the radix unchanged no matter what it was.

set output-radix base
Set the default base for numeric display. Supported choices for base are decimal 8, 10, or 16. base must itself be specified either unambiguously or using the current default radix.

show input-radix
Display the current default base for numeric input.

show output-radix
Display the current default base for numeric display.


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