Simple generic programming example using C11

generic.c

#include <stdio.h>

const char* tni();
const char* tnf();

#define typename(T) ((_Generic((T), int: tni, float: tnf))())

int main()
{
  int foo;
  float bar;

  printf("variable 'foo' has the type of '%s'\n", typename(foo));
  printf("variable 'bar' has the type of '%s'\n", typename(bar));

}

const char* tni()
{
  static const char* type = "int";
  return type;
}

const char* tnf()
{
  static const char* type = "float";
  return type;
}