text: #include <stdio.h>
  
  #define MAX(a,b) ( a > b ? a : b )
  #define MAX3(a,b,c) ( MAX ( MAX ( a, b ), c ) )
  
  int main (void) {
  
      int first, second, third;
  
      printf("enter three numbers: ");
      scanf("%d %d %d", &first, &second, &third);
  
      printf("maximum is %d\n", MAX3 (first, second, third) );
  
      return 0;
  
  }
  