Practical 12 PPS

Write a program to find sum of elements of 1-D Array using Function.

#include <stdio.h>

#include <conio.h>

    int

    main()

{

    int a[1000], i, n, sum = 0;

    printf("Enter size of the array : ");

    scanf("%d", &n);

    printf("Enter elements in array : ");

    for (i = 0; i < n; i++)

    {

        scanf("%d", &a[i]);

    }

    for (i = 0; i < n; i++)

    {

        sum += a[i];

    }

    printf("sum of array is : %d", sum);

    return 0;

}

Write a program that use user defined function swap() to interchange the value of two variable.

#include <stdio.h>

void swap(int *, int *);

int main()

{

    int n1, n2;

    printf("\n\n Function : swap two numbers using function :\n");

    printf("------------------------------------------------\n");

    printf("Input 1st number : ");

    scanf("%d", &n1);

    printf("Input 2nd number : ");

    scanf("%d", &n2);

    printf("Before swapping: n1 = %d, n2 = %d ", n1, n2);

    // pass the address of both variables to the function.

    swap(&n1, &n2);

    printf("\nAfter swapping: n1 = %d, n2 = %d \n\n", n1, n2);

    return 0;

}

void swap(int *p, int *q)

{

    // p=&n1 so p store the address of n1, so *p store the value of n1

    // q=&n2 so q store the address of n2, so *q store the value of n2

    int tmp;

    tmp = *p; // tmp store the value of n1

    *p = *q;  // *p store the value of *q that is value of n2

    *q = tmp; // *q store the value of tmp that is the value of n1

}

Write a program to find factorial of a number using recursion.

#include <stdio.h>

long int multiplyNumbers(int n);

int main()

{

    int n;

    printf("Enter a positive integer: ");

    scanf("%d", &n);

    printf("Factorial of %d = %ld", n, multiplyNumbers(n));

    return 0;

}

long int multiplyNumbers(int n)

{

    if (n >= 1)

        return n * multiplyNumbers(n - 1);

    else

        return 1;

}

Write a program to generate Fibonacci series using recursion  

#include <stdio.h>

int main()

{

    int n1 = 0, n2 = 1, n3, i, number;

    printf("Enter the number of elements:");

    scanf("%d", &number);

    printf("\n%d %d", n1, n2);   // printing 0 and 1

    for (i = 2; i < number; ++i) // loop starts from 2 because 0 and 1 are already printed

    {

        n3 = n1 + n2;

        printf(" %d", n3);

        n1 = n2;

        n2 = n3;

    }

    return 0;

}