Array & Swap Elements in c pgm

Calculate Sum of all Elements of an Array using Pointers as Arguments

#include 

#include 

void main()

{

    static int array[5] = { 200, 400, 600, 800, 1000 };

    int sum;

    int addnum(int *ptr);

    sum = addnum(array);

    printf("Sum of all array elements = %5d\n", sum);

}

int addnum(int *ptr)

{

    int index, total = 0;

    for (index = 0; index < 5; index++)

    {

        total += *(ptr + index);

    }

    return(total);

   getch();

}

Output

            Sum of all array elements =  3000

Accept an Array & Swap Elements using Pointers

#include 

#include 

void swap34(float *ptr1, float *ptr2);

void main()

{

    float x[10];

    int i, n;

    clrscr();

    printf("How many Elements...\n");

    scanf("%d", &n);

    printf("Enter Elements one by one\n");

    for (i = 0; i < n; i++)

    {

        scanf("%f", x + i);

    }

    swap34(x + 2, x + 3);

    printf("\nResultant Array...\n");

    for (i = 0; i < n; i++)

    {

        printf("x[%d] = %f\n", i, x[i]);

    }

}

void swap34(float *ptr1, float *ptr2 )

{

    float temp;

    temp = *ptr1;

    *ptr1 = *ptr2;

    *ptr2 = temp;

getch();

}

Output

How many Elements...

4

Enter Elements one by one

23

67

45

15

Resultant Array...

x[0] = 23.000000

x[1] = 67.000000

x[2] = 15.000000

x[3] = 45.000000