C语言指针将数组中n个整数按相反顺序存放

Posted 2022-12-01

#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;