[pointer] the array is stored in reverse order and output

requirement

Programming , Input n An integer is stored in a one-dimensional array , Re store in reverse order and then output .（ Use a pointer to achieve ）

Code

#include<stdio.h>
/* *  This function is used to input a one-dimensional integer array , The input data is stored in the formal parameter a Array  *  Input data in 0 As an end sign ,0 It is not stored in the array nor included in the total number of input data  *  The return value is the number of input data  */
int input(int a[])
{
    
    int n=0;
     int b = 0;
    do
    {
    
        scanf("%d",&b);
        if(b == 0)
        break;
        else
        {
    
            a[n] = b;
            n++;
        }
    }
    while(b != 0);
    return n;

}

/* *  This function is used to calculate the formal parameter array a Storage in reverse order  * n by a The number of integers in the array  */
void fun(int a[],int n)
{
    
    int b[n],c = 0;
    for(int i = n-1;i>=0;i--)
    {
    
        b[c] = a[i];
        c++;
    }
    for(int i = 0;i<n;i++)
    {
    
        a[i] = b[i];
    }
}

main function

int main()
 {
    
    int a[200],n;
    n=input(a);
    fun(a,n);
    for(int i=0;i<n;i++)
        printf("%d ",a[i]);
    return 0;
 } 

test

Test input
1 3 5 7 0
Output
7 5 3 1