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cpp:cctype:isdigit
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isdigit

    int isdigit(int chr);

tests if a character a digit

cpp Sourcecode Example

#include <iostream> /* including standard library */
#include <string>
#include <cctype>
 
using namespace std;
int main ( void )
{
  int i;
  string str="Test\n-!&%1";
  for (i=0; i <= 11;i++)
    {
     if ( isdigit(str[i]) != 0 )
      {
       cout << "Character " << i << " is a digit" << endl;
      }
    }
  return 0;
}

output

  Character 9 is a digit
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cpp/cctype/isdigit.txt · Last modified: 2012/10/12 15:03 (external edit)

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