Write a C program to read elements in an array and find its reverse. C program to print reverse of an array. How to find reverse of an array elements.

If the elements of the array are: 10, 5, 16, 35, 500

Then its reverse would be: 500, 35, 16, 5, 10

That is if

array[0] = 10

array[1] = 5

array[2] = 16

array[3] = 35

array[4] = 500

Then after reversing array elements should be

array[0] = 500

array[1] = 35

array[2] = 16

array[3] = 5

array[4] = 10

Step 1: Take two array say A and B. A will hold the original values and B will hold the reversed values.

Step 2: Read elements in array A.

Step 3: Set i=size - 1, j=0 (Where size is the size of array).

Step 4: Set B[j] = A[i]

Step 5: Set j = j + 1 and i = i - 1.

Step 6: Repeat Step 4-5 till i>=0.

Step 7: Print the reversed array in B.

Happy coding ;)

**Example:**If the elements of the array are: 10, 5, 16, 35, 500

Then its reverse would be: 500, 35, 16, 5, 10

That is if

array[0] = 10

array[1] = 5

array[2] = 16

array[3] = 35

array[4] = 500

Then after reversing array elements should be

array[0] = 500

array[1] = 35

array[2] = 16

array[3] = 5

array[4] = 10

### Required knowledge:

Basic C programming, For Loop, Array### Algorithm:

Basic algorithm for reversing any array.Step 1: Take two array say A and B. A will hold the original values and B will hold the reversed values.

Step 2: Read elements in array A.

Step 3: Set i=size - 1, j=0 (Where size is the size of array).

Step 4: Set B[j] = A[i]

Step 5: Set j = j + 1 and i = i - 1.

Step 6: Repeat Step 4-5 till i>=0.

Step 7: Print the reversed array in B.

### Program:

/** * C program to find reverse of an array */ #include <stdio.h> int main() { int arr[100], reverse[100]; int size, i, j; /* * Reads the size of array and elements in array */ printf("Enter size of the array: "); scanf("%d", &size); printf("Enter elements in array: "); for(i=0; i<size; i++) { scanf("%d", &arr[i]); } /* * Reverse the array */ j=0; for(i=size-1; i>=0; i--) { reverse[j] = arr[i]; j++; } /* * Prints the reversed array */ printf("\nReversed array : "); for(i=0; i<size; i++) { printf("%d\t", reverse[i]); } return 0; }

Output

Enter size of the array: 5

Enter elements in array: 10 5 16 35 500

Reversed array : 500 35 16 5 10

Enter elements in array: 10 5 16 35 500

Reversed array : 500 35 16 5 10

Happy coding ;)

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