#include <stdio.h>
int main(void)

{
int numbers[10];
int count=10;
long sum=0L;
float average=0.0f;

printf("\nEnter the 10 numbers:\n");
for(int i=0;i<count;i++)

{
printf（"%2d>",i+1);
scanf("%d",&numbers[i]);
sum+=numbers[i];
}
average=(float)sum/count;
printf("\nAverage of the numbers entered is :%f\n",average);
getch();
return 0;
}

for(int i=0;i<count;i++)
没有错误，除非你的编译器说这句话不对，那就换C99的编译器或者不要这么声明

求解long sum=0L,这个L是干嘛的。为啥后面还有个getch()

#include <stdio.h>
 int main(void)
 
{
 int numbers[10];
 int count=10;
 long sum=0L;
 float average=0.0f;
 
printf("\nEnter the 10 numbers:\n");
 for(int i=0;i<count;i++)
 
{
 printf("%d>",i+1);//仔细点中文（和英文的(的区别
 scanf("%d",&numbers[i]);
 sum+=numbers[i];
 }
 average=(float)sum/count;
 printf("\nAverage of the numbers entered is :%f\n",average);
 //getch();//这个是写来干嘛的啊
 return 0;
 } //哎真没想到