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c:ctype.h:isdigit

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c:ctype.h:isdigit [2013/01/22 22:02] (current)
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 +{{keywords>wiki library source code example reference}}
 +====== isdigit ======
 +<code c>
 +    int isdigit(int chr);
 +</code>
 +
 +tests if a character a digit
 +
 +===== C Sourcecode Example =====
 +<code c>
 +#include <stdio.h> /* including standard library */
 +//#include <windows.h> /* uncomment this for Windows */
 +
 +#include <ctype.h>
 +
 +int main ( void )
 +{
 +  int i;
 +  char string[11]="Test\n-!&%1";
 +  for (i=0; i <= 11;i++)
 +    {
 +     if ( isdigit(string[i]) != 0 )
 +      {
 +       printf("Character %i is a digit\n",i);
 +      }
 +    }
 +  return 0;
 +}
 +</code>
 +
 +==== output ====
 +    user@host:~$ ./isdigit 
 +    Character 9 is a digit
  
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c/ctype.h/isdigit.txt · Last modified: 2013/01/22 22:02 (external edit)

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