C Program to Sum of The First and Last Digit Of 'n' Digit Number

How to write a C Program to Sum of The First and Last Digit Of  'n' Digit Number  in C Programming Language ?

1. int main()
2. {
3. int num,len,last;
4. printf("\nEnter n digit number \n");
5. scanf("%d",&num);
6. last=num%10;
7. while(num>0)
8. {
9. num=num/10;
10. len=len+1;
11. }
12. num=num/(pow(10,len-1));
13. num=num%10;
14. printf("the result is %d",last+num);
15. getch();
16. return 0;
17.  
18. }

C Program to Sum of First and Last Digits of a Four-Digit number

How to write a C Program to Sum of First and Last Digits of a Four-Digit number in C Programming Language ?

Solution:

This program is based on the "sum of digits" program discussed previously.
This program also has some usage of the Modulus Operator.

If a four-digit number is input through the keyboard,
write a program to obtain the sum of the first and the last digit of this number.

/*HINT: If a number is divided using % , then the number to the right side of the decimal point is the result. (This applies only to integers.) */

#include<stdio.h>


 


main ()


 


{


 


int number, last_digit, first_digit, total;


 


printf (" Enter the number which is to be operated on: ");


 


scanf ("%d", &number);


 


 


 


last_digit = number % 10;


 


total = last_digit;


 


 


 


first_digit = (number / 1000) % 10;


 


total = total + first_digit;


 


 


 


printf ("The total of the first and the last digit of the entered number is: %d", total);


 


 


 


}

C Program To Remove Last Of Singly Linked List And Insert It At Beginning of List

How to write a C Program to remove last of singly linked list and insert it at beginning of list in C Programming Language ?

Solution:
/*write a c program to remove last of singly linked list and insert it at beginning of list*/