**C programs on recursion. Collections of function recursion programs source code examples in c programming language frequently asked in interview**

Sum of n numbers using recursion in c

Sum of n numbers using recursion in c

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ReplyDeletewrite a C program for Tower of Hanoi problem with a example of 4 disks .

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following is the program

#include "stdio.h"

void towers(int,char,char,char);

void towers(int n,char frompeg,char topeg,char auxpeg)

{ /* If only 1 disk, make the move and return */

if(n==1)

{ printf("\nMove disk 1 from peg %c to peg %c",frompeg,topeg);

return;

}

/* Move top n-1 disks from A to B, using C as auxiliary */

towers(n-1,frompeg,auxpeg,topeg);

/* Move remaining disks from A to C */

printf("\nMove disk %d from peg %c to peg %c",n,frompeg,topeg);

/* Move n-1 disks from B to C using A as auxiliary */

towers(n-1,auxpeg,topeg,frompeg);

}

main()

{ int n;

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

scanf("%d",&n);

printf("The Tower of Hanoi involves the moves :\n\n");

towers(n,'A','C','B');

return 0;

}

In the function tower ,there has been 2 recursive function call,does the statement below 1st

recursive function gets executed if yes then how?

please explain step wise as i am new to programming.

Regards

#include

Deletevoid move(int n,char s,char d)

{

printf("Move the %d plate from %c to %c\n",n,s,d);

}

void toh(char s,char d,char u,int n)

{

if(n!=0)

{

toh(s,u,d,n-1);

move(n,s,d);

toh(u,d,s,n-1);

}

else

return;

}

void main()

{

toh('A','B','C',4);

}

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1) Write a program with dedicated functions to find the sum of the following series:

Deletea. 2, 5, 7, . . ., 2N + 1

b. -2, 4, 46, . . ., 6n3 – 2

Note that the functions must be written as a recursive functions.

how to solve this?

2) Write a program to solve the following algebraic formula in a recursive form.

ReplyDeletey = 1 – x + x2/2 – x3/6 + x4/24 + . . . + (-1)nxn/n!

You may have to write and use a factorial function in this program.

Note that the factorial function must also be written as a recursive function.