WEEK:7 PROGRAMMING ASSIGNMENT 1 SOLUTION (Jan 2020-Apr2020) An Introduction to Programming through C++ NPTEL 2020

  

               An Introduction To Programming Through C++

IIT Bombay.

Week 7- Programming Assignment 1:

The input for this program consists of numbers n, a0, a1, ..., a{n-1}, b0, b1, b{n-1}.  In this, ai and bi are supposed to be the ith least significant digits of numbers A, B.  You are supposed to print the digits of the sum of A, B, again from least significant to the most significant - one per line. Note that the sum can have n+1 digits, and so you should print n+1 digits, with the most significant digit being possibly 0.You may assume that the size of an array can be a value that is known only during execution.  For example, it is OK to write 

"int n; cin >>n; int A[n];"

Sample Test Cases

Input Output

Test Case 1

3 

3 2 1

6 5 4

9

7

5

0

Test Case 2

20

9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9

9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9

8

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

9

1

WRITE/COPY THESE CODE DIRECTLY IN NPTEL TERMINAL AND COMPILE AND RUN THEN SUBMIT.

PROGRAM:

#include<iostream>
using namespace std;
int main(){
   int n;
   cin>>n;
   int A[n], B[n];

   for (int i=0; i < n; ++i){
      cin>> A[i];
   } 
   
   for (int i=0; i < n; ++i){
      cin>> B[i];
   }
   
   int sum[n+1];
   sum[n] = 0; 
   
   int carry = 0; 
   int i=0;
   for (; i < n; ++i){
      int digitSum = A[i] + B[i] + carry;
          
      sum[i] = digitSum % 10;
      carry = digitSum / 10; 
   }
   
   if(carry != 0){
      sum[i] = carry;
   }

   
   for (int i=0; i < n+1; ++i){
      cout << sum[i]<<"\n";
      
         
   }
   
   return 0;

}

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