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| <h3 class="section">22.5 Numbers</h3> |
| |
| <p><a name="index-number-representation-1462"></a><a name="index-entering-numbers-1463"></a> |
| You can always enter numbers in octal, decimal, or hexadecimal in |
| <span class="sc">gdb</span> by the usual conventions: octal numbers begin with |
| ‘<samp><span class="samp">0</span></samp>’, decimal numbers end with ‘<samp><span class="samp">.</span></samp>’, and hexadecimal numbers |
| begin with ‘<samp><span class="samp">0x</span></samp>’. Numbers that neither begin with ‘<samp><span class="samp">0</span></samp>’ or |
| ‘<samp><span class="samp">0x</span></samp>’, nor end with a ‘<samp><span class="samp">.</span></samp>’ 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 commands described below. |
| |
| |
| <a name="index-set-input_002dradix-1464"></a> |
| <dl><dt><code>set input-radix </code><var>base</var><dd>Set the default base for numeric input. Supported choices |
| for <var>base</var> are decimal 8, 10, or 16. <var>base</var> must itself be |
| specified either unambiguously or using the current input radix; for |
| example, any of |
| |
| <pre class="smallexample"> set input-radix 012 |
| set input-radix 10. |
| set input-radix 0xa |
| </pre> |
| <p class="noindent">sets the input base to decimal. On the other hand, ‘<samp><span class="samp">set input-radix 10</span></samp>’ |
| leaves the input radix unchanged, no matter what it was, since |
| ‘<samp><span class="samp">10</span></samp>’, being without any leading or trailing signs of its base, is |
| interpreted in the current radix. Thus, if the current radix is 16, |
| ‘<samp><span class="samp">10</span></samp>’ is interpreted in hex, i.e. as 16 decimal, which doesn't |
| change the radix. |
| |
| <p><a name="index-set-output_002dradix-1465"></a><br><dt><code>set output-radix </code><var>base</var><dd>Set the default base for numeric display. Supported choices |
| for <var>base</var> are decimal 8, 10, or 16. <var>base</var> must itself be |
| specified either unambiguously or using the current input radix. |
| |
| <p><a name="index-show-input_002dradix-1466"></a><br><dt><code>show input-radix</code><dd>Display the current default base for numeric input. |
| |
| <p><a name="index-show-output_002dradix-1467"></a><br><dt><code>show output-radix</code><dd>Display the current default base for numeric display. |
| |
| <br><dt><code>set radix </code><span class="roman">[</span><var>base</var><span class="roman">]</span><dt><code>show radix</code><dd><a name="index-set-radix-1468"></a><a name="index-show-radix-1469"></a>These commands set and show the default base for both input and output |
| of numbers. <code>set radix</code> sets the radix of input and output to |
| the same base; without an argument, it resets the radix back to its |
| default value of 10. |
| |
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