C program to reverse an array

#include  
int main() 
{ 
      int n, c, d, a[100], b[100]; 
      printf("Enter the number of elements in array\n"); 
      scanf("%d", &n); 
      printf("Enter the array elements\n"); 
      for (c = 0; c < n ; c++) 
           scanf("%d", &a[c]); 
      for (c = n - 1, d = 0; c >= 0; c--, d++) 
           b[d] = a[c]; 
      for (c = 0; c < n; c++) 

           a[c] = b[c]; 

      printf("Reverse array is\n"); 

      for (c = 0; c < n; c++) 

      printf("%d\n", a[c]);
 
 return 0; 

}

This program reverses the array elements. For example if a is an array of integers with three elements such that
a[0] = 1
a[1] = 2
a[2] = 3

Then on reversing the array will be
a[0] = 3
a[1] = 2
a[0] = 1