#include <stdio.h>

struct {
	int i1;
	float f1;
} s1;

struct Struct2 {
	int i2;
	float f2;
};

typedef struct {
	int i3;
	float f3;
} Struct3;

int main(){
	s1.i1 = 11;
	s1.f1 = 12.0;
	struct Struct2 s2;
	s2.i2 = 21;
	s2.f2 = 22.0;
	Struct3 s3;
	s3.i3 = 31;
	s3.f3 = 32.0;
	printf("%d, %f\n", s1.i1, s1.f1);
	printf("%d, %f\n", s2.i2, s2.f2);
	printf("%d, %f\n", s3.i3, s3.f3);
}