>>710
#include <stdio.h>
#include <math.h>
double avg(int x, int y)
{
    double addavg = (x+y)/2.0;
    double mulavg = sqrt((double)x*y);
    printf("相加平均 : %f\n",addavg);
    printf("相乗平均 : %f\n",mulavg);
    return abs(addavg-mulavg);
}
int main()
{
    int x,y;
    printf("1つ目の整数 => ");
    scanf("%d",&x);
    printf("2つ目の整数 => ");
    scanf("%d",&y);
    printf("avg(%d,%d) : %f\n",x,y,avg(x,y));
    return 0;
}