#include <stdio.h>

void sum(int x, int y, int z);
double ave(double a, double b, double c);
int main(){
	int x,y,z;
	double a,b,c;
	printf("x:"); scanf("%d",&x); 
	printf("y:"); scanf("%d",&y); 
	printf("z:"); scanf("%d",&z); 
	printf("a:"); scanf("%lf",&a); 
	printf("b:"); scanf("%lf",&b); 
	printf("c:"); scanf("%lf",&c); 
	sum(x,y,z);
	printf("ave = %f\n",ave(a,b,c));
    return 0;
}

void sum(int x, int y, int z){
	int value_sum;
	value_sum = x + y + z;
	printf("sum = %d\n",value_sum);
}
double ave(double a, double b, double c){
	double value_ave;
	value_ave = (a + b + c) / 3.0;
	return value_ave;

}