#include
typedef struct stt
{
float num;
}STT;
int main( )
{
STT stt1,stt2;
scanf("%f%f",&stt1.num,&stt2.num);
printf("平均值:%f\n",(stt1.num+stt2.num)/2);
return 0;
}
#define
struct A { int x,y; float av; } a;
void main() {
scanf("%d%d",&a.x,&a.y); a.av=a.x+a.y; a.av/=2; printf("%f\n",a.av);
}