#include <stdio.h>
int main()
{
void inv(int x[],int n); //inv函数声明//
int i,a[10] = {3,5,7,9,2,3,0,1,6,4}; //定义数组，注意不要溢出，元素可以自定义//
printf("The array has been inverted:n");
for(i = 0;i<10;i++)
printf("%2d",a[i]); //输出未交换时数组各元素的值 //
printf("n");
inv(a,10); //调用inv函数//
printf("The array has been inverted:n"); //输出交换后的各元素的值 //
for(i = 0;i<10;i++)
printf("%2d",a[i]); //输出格式2d便于查看，个人习惯//
printf("n");
return 0;
}
void inv(int x[],int n) //形参x是数组名//
{
int temp,i,j,m = (n-1)/2;
for(i=0;i<=m;i++)
{
j = n-1-i;
temp = x[i]; //此处也可以写成一行，这样写纯属层次清晰//
x[i] = x[j];
x[j] = temp;
}
return;
