How to find the average of n numbers in C language?

C language to find the average of n numbers:

Recommended: "c Language Tutorial"

#include<stdio.h>
int main(void)
{
int a[100] = { NULL };//初始化数组元素
int i = 0, n;//定义循环变量和正整数变量n
float sum = 0.0;//定义和变量为float型，注意计算的数据类型
float average = 0.0;//定义平均数变量为float型，注意计算的数据类型
printf("Please input n (n<100) :");
scanf("%d", &n);//输入正整数n
printf("Please input %d integers:", n);//提示输入几个正整数
for (i = 0; i < n; i++)//循环输入元素
{
scanf("%d", &a[i]);//输入整形变量
sum += a[i];//循环输入的时候同时进行求和
}
//for (i = n - 1; i >= 0; i--)
printf("the a[n] number: ");//倒叙输出数组元素
for (i = 0; i < n; i++)//循环输入元素
printf("%d ", a[i]);//倒叙输出数组元素
printf("\n");
average = sum / (float)n;//注意不同类型之间的计算，这里加了类型强制转换
printf("averge=%.2f\n", average);//输出平均数
return 0;
}

The program running results are as follows:

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