/*
#include <stdio.h>
int memo[14][14]= {0};
int rec(int k, int n)
{
if(memo[k][n]!=0)
{
return memo[k][n];
}
if(k==1 || n==1)
{
return memo[k][n]=1;
}
return memo[k][n]= rec();
}
int main()
{
int k,n;
while( scanf("%d %d", &k, &n) != EOF )
printf("%d\n", SuperSum(k, n));
}
*/
/*
#include <stdio.h>
void rec(int n)
{
if(n==0)
{
return;
}include <stdio.h>
void rec(int n)
{
if(n==0)
{
return;
}
rec(n-1);
//printf("%d\n",n);
draw(n);
}
void draw(int n)
{
if(n==0)
{
printf("\n");
return;
}
printf("*");
draw(n-1);
}
int main()
{
int n;
scanf("%d",&n);
rec(n);
}
//printf("%d\n",n);
draw(n);
}
void draw(int n)
{
if(n==0)
{
printf("\n");
return;
}
printf("*");
draw(n-1);
}
int main()
{
int n;
scanf("%d",&n);
rec(n);
}
*/
/*
#include <stdio.h>
void rec(int n)
{
if(n==0)
{
return;
}
rec(n/2);
printf("%d",n%2);
}
int main()
{
int n;
scanf("%d",&n);
if(n==0) {
printf("0");
}
else {
rec(n);
}
}
*/
#include<stdio.h>
struct human {
char name[10];
double height;
double weight;
double eyeSight[2];
double hairLength;
//..
};
int main() {
struct human x;
struct human student[2];
struct human temp;
student[0].height = 100;
student[0].weight = 200;
student[1].height = 200;
student[1].weight = 50;
printf("%lf %lf\n", student[0].height, student[0].weight);
printf("%lf %lf\n", student[1].height, student[1].weight);
temp = student[0];
student[0] = student[1];
student[1] = temp;
printf("%lf %lf\n", student[0].height, student[0].weight);
printf("%lf %lf\n", student[1].height, student[1].weight);
// call by reference
}