Point out the error in the following program ( on GCC compi

Point out the error in the following program ( on GCC compiler).

#include  
 union emp {     
   int empno;     
   int age; 
 };  
 int main() {   
   union emp e = {10, 25}; 
   printf("%d %d", e.empno, e.age); 
   return 0; 
 }