Question

write a program in C++ to enter on three digt
number and print the sum of of first and last
digit of the number​

Answer 1

#include <iostream>

using namespace std;

int main()

{

  int n,first,last,sum;

   cout << "\n\n Find the sum of first and last digit of a number:\n";

   cout << "------------------------------------------------------\n";

   cout << " Input any number: ";

   cin >> n;

   first = n;

last=n % 10;

for(first=n;first>=10;first=first/10);

   cout<<" The first digit of "<<n<<" is: "<<first<<endl;

   cout<<" The last digit of "<<n<<" is: "<<last<<endl;

cout<<" The sum of first and last digit of "<<n<<" is: "<<first+last<<endl;

}

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Answer 2

#include<stdio.h>

int main()

{

   printf("\n\n\t\tStudytonight - Best place to learn\n\n\n");

   int input, firstNumber, lastNumber;

   printf("Enter a number: ");

   scanf("%d", &input);

   /*

       gives remainder when the input value is divided by 10  

       i.e. the digit at units place

   */

   lastNumber = input%10;

   

   firstNumber = input;

   while(firstNumber >= 10)

   {

       firstNumber /= 10;  // same as firstNumber = firstNumber/10

   }

   printf("\n\n\nAddition of first and last number is: %d + %d = %d\n", firstNumber, lastNumber, firstNumber+lastNumber);

   printf("\n\n\t\t\tCoding is Fun !\n\n\n");

   return 0;

}