Question

Please write a C++ Program for the following problem >> Vector: Calculation the sum of each two adjacent Numbers....

>>【Description】

Read integer numbers from keyboard and store them into a vector. Calculation the sum of each two adjacent Numbers, store the result into another vector. Then output the result inversely.

For example, if the input is

1 2 3 4 5

then the output is

9 7 5 3

【 Input】

There are 5 test cases.

For each case, there are 2 lines. The first line contains an integer number n, which indicates the number of data store in the vector. The second line contains n integer numbers.

  

【Output】

There is 1 row for each input case. And each row contains n-1 integer numbers.

【Sample Input】

5

1 2 3 4 5

5

1 -1 0 -1 1

4

100 900 10000 4000

【Sample Output】

9 7 5 3

0 -1 -1 0

14000 10900 1000

Answer 1

#include<iostream>

#include<vector>

using namespace std;

int main()

{

    int n, i, x, j;

   

    for( j = 1 ; j <= 5 ; j++ )

    {

        // create a vector to store values of type int

        vector<int> arr;

       

        // get user input

        cin>>n;

       

        // loop n times

        for( i = 0 ; i < n ; i ++ )

        {

            // get user input

            cin>>x;

           

            // add element to vector

          arr.push_back(x);

        }

       

        vector<int> adjacent_sum;

       

        for( i = arr.size() - 1 ; i > 0 ; i-- )

        {

            // calculate the sum of adjacent elements

            int sum = arr[i] + arr[i - 1];

          

            adjacent_sum.push_back(sum);

        }

       

        // traverse the vector

        for( i = 0 ; i < adjacent_sum.size() ; i++ )

            cout<<adjacent_sum[i]<<" ";

           

        cout<<endl;

    }

       

    return 0;

}

Sample Output

1 2 3 45 9 7 5 3 1 -1 e -1 1 14000 10900 1000 5698 74 11 15 17 15 11