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)8 struct 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