text: /*MACRO to test if char is upper case*/
  #include <stdio.h>
  #define IsUpper(x) (x >= 'A' && x <= 'Z' ? 1 : 0)
  
  int main (void)
   {
   	char alpha = 'X', beta = 'x' ;
  	if ( IsUpper(alpha) )		//testing alpha
  	 printf("Upper case\n") ;
  	else
  	 printf("Not upper case\n") ;
  	if ( IsUpper(beta) )		//testing beta
  	 printf("Upper case\n") ;
  	else
  	 printf("Not upper case\n") ;
  	return 0 ;
   }