1 #ifdef HAVE_STDLIB_H 2 #include <stdlib.h> 3 #endif 4 #include <stdio.h> 5 #include <math.h> 6 #include "yagi.h" 7 subtract_structures(struct performance_data a,struct performance_data b)8struct performance_data subtract_structures(struct performance_data a, struct performance_data b) 9 { 10 struct performance_data ans; 11 12 ans.gain=a.gain-b.gain; 13 ans.fb=a.fb-b.fb; 14 ans.swr=a.swr-b.swr; 15 ans.r=a.r-b.r; 16 ans.x=a.x-b.x; 17 ans.sidelobe=a.sidelobe-b.sidelobe; 18 return(ans); 19 } 20 21