第1个回答 2015-04-28
#include <stdio.h>
#include <stdlib.h>
int main(){
int* data;
int n, i;
int count=0,sum=0;
double avg;
//input n
do{
printf("please input n( n > 0 ):");
scanf("%d",&n);
}while(n<=0);
data = (int*)(malloc(n*sizeof(int)));
//input n data
for(i = 0;i<n;i++){
printf("please input %d number:", i+1);
scanf("%d",data+i);
}
//even number average
for(i=0;i<n;i++){
if(data[i]%2==0){
count++;
sum+=data[i];
}
}
avg = count > 0? 1.0*sum/count: 0;
printf("%d even number average is %0.2f\n",count,avg);
return 0;
}