Write a function that reverses the contents of an array of double and test it in

Question

Write a function that reverses the contents of an array of double and test it in a simple program.

GIVEN CODE:

#include <stdio.h>
#include <stdlib.h>

void PrintArray(int *a, int size)
{
   int i;
  
   for (i = 0; i < size; i++)
      printf("%d ", *(a+i));
  
   printf(" ");  
}

int main()
{
   int   *pa;
   int   size;
   int   i, j;
   int   temp;
  
   printf("Data size: ");
   scanf("%d", &size);
  
   if (size < 1)
      return -1;
     
     
   pa = (int*) malloc( size * sizeof(int));
   if (pa == NULL){
      printf(" Error ");
      return -2;
   }
   for (i = 0; i < size; i++)
      scanf("%d", (pa + i));
  
   printf(" Array: ");
   PrintArray(pa, size);
  
   // Reverses the Array Here
   reverseArray(pa,size);
void reverseArray(int *a, int size)
{
int j;
printf(" ReverseArray: ");
for (j = size-1; j >=0; j--)
printf("%d ", *(a+j));
}

   printf(" New Array ");
   PrintArray(pa, size);  
   free(pa);
  
   return 0;
  
}

Explanation / Answer

//preprocessor directives

#include<stdio.h>

# include<conio.h>

using namespace std;

//starting execution from here

int main() {

double arr[30], temp;

int i,j,num;

//enter total number of elements

   printf(" Enter no of elements : ");

   scanf("%d", &num);

   //Read elements in an array

   for (i = 0; i < num; i++) {

      scanf("%lf", &arr[i]);

   }

   j = i - 1;   // j will Point to last Element

   i = 0;       // i will be pointing to first element

   while (i < j) {

      temp = arr[i];

      arr[i] = arr[j];

      arr[j] = temp;

      i++;             // increment i

      j--;          // decrement j

   }

//reverse array

   printf(" Result after reversal : ");

   for (i = 0; i < num; i++) {

      printf("%lf ", arr[i]);

   }

getch();

   return (0);

}

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