#include <stdio.h>
 
int main(void) {
	int i,n,m,max1=0,max2=-1,sum=0,a[]={3,5,2,4,1,9,7,6,0,8};
	double S;
	for(i=0;i<10;i++){
		if(a[i]>max1){
			max1=a[i];
			n=i;
		}
		}
		for(i=0;i<10;i++){
		if(a[i]!=max1&&a[i]>max2){
			max2=a[i];
			m=i;}
		}
		for(i=0;i<10;i++){
			sum+=a[i];
		}
			S=(double)sum/10;
 
	printf("最大値:%d %d番目\n",max1,n);
	printf("2番目に大きい値%d %d番目\n",max2,m);
	printf("平均値:%2lf",S);
	return 0;
}
 

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