how to chk if a no. is integer or not.

Source : http://stackoverflow.com/questions/784563/c-check-whether-is-number-is-int-float/784825

#include
using namespace std;
int main(){
 double num1;
 cin>>num1;
 if(static_cast(num1) == num1)//casts num1 to type int
  cout<<"Integer"<
 else
  cout<<"Not Integer"<
  return 0;
  }

Another method is

char *test = "asdf1234";
int i;
for (i = 0; i < strlen (test); i++)
{
    if (isdigit (test[i]))
        fprintf (stdout, "test[%d] is a digit!\n", i);
}