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6 <title>A # Not Followed by a Macro Argument</title> |
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10 <h3>A # Not Followed by a Macro Argument</h3> |
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11 <p>(ISO C, §6.10.3) The C compiler can accept <span class="code">#</span> tokens that do not appear before arguments in macro definitions.</p> |
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12 <div class="listing"> |
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13 <h5>Listing 1. Preprocessor Macros Using # Without an Argument</h5> |
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14 <p>#define add1(x) #x #1 // OK, but probably not what you wanted:<br /> |
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15 // add1(abc) creates "abc"#1<br /> |
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16 #define add2(x) #x "2" // OK: add2(abc) creates "abc2"</p> |
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