A+B for Input-Output Practice(using C++)

1.

Problem Description
Your task is to Calculate a + b. Too easy?! Of course! I specially designed the problem for acm beginners. You must have found that some problems have the same titles with this one, yes, all these problems were designed for the same aim
Input
The input will consist of a series of pairs of integers a and b, separated by a space, one pair of integers per line.
Output
For each pair of input integers a and b you should output the sum of a and b in one line, and with one line of output for each line in input.
Sample Input
1 6 1 20
Sample Output
7 21

#include<iostream>
using namespace std;
int main()
{
    int x,y;
    while(cin>>x>>y)
    {
        cout<<x+y<<endl;
    }
    return 0;
}

2.

Problem Description
The first line integer means the number of input integer a and b. Your task is to Calculate a + b.
Input
Your task is to Calculate a + b. The first line integer means the numbers of pairs of input integers.
Output
For each pair of input integers a and b you should output the sum of a and b in one line, and with one line of output for each line in input.
Sample Input
2 10 20 22 36
Sample Output
30 58

#include<iostream>
using namespace std;
int main()
{
    int n,i;
    int a,b;
    cin>>n;
    for(i=0;i<n;i++)
    {
        cin>>a>>b;
        cout<<a+b<<endl;
    }
    return 0;
}

3.

Problem Description
Your task is to Calculate a + b.
Input
Input contains multiple test cases. Each test case contains a pair of integers a and b, one pair of integers per line. A test case containing 0 0 terminates the input and this test case is not to be processed.
Output
For each pair of input integers a and b you should output the sum of a and b in one line, and with one line of output for each line in input.
Sample Input
1 5 10 20 0 0
Sample Output
6 30

#include<iostream>
using namespace std;
int main()
{
    int a,b;
    while(cin>>a>>b)
    {
        if(a==0&&b==0)break;
        else
            cout<<a+b<<endl;
    }
    return 0;
}

4.

Problem Description
Your task is to Calculate the sum of some integers.
Input
Input contains multiple test cases. Each test case contains a integer N, and then N integers follow in the same line. A test case starting with 0 terminates the input and this test case is not to be processed.
Output
For each group of input integers you should output their sum in one line, and with one line of output for each line in input.
Sample Input
4 1 2 3 4 5 1 2 3 4 5 0
Sample Output
10 15

#include<iostream>
using namespace std;
int main()
{
    int n;
    while(cin>>n)
    {   
        if(n==0)return 0;
        int x,sum=0;
        while(n--)
        {
            cin>>x;
            sum+=x;
        }
        cout<<sum<<endl;
    }
    return 0;
}

5.

Problem Description
Your task is to calculate the sum of some integers.
Input
Input contains an integer N in the first line, and then N lines follow. Each line starts with a integer M, and then M integers follow in the same line.
Output
For each group of input integers you should output their sum in one line, and with one line of output for each line in input.
Sample Input
2 4 1 2 3 4 5 1 2 3 4 5
Sample Output
10 15

#include<iostream>
using namespace std;
int main()
{
    int N;
    int i;
    int n,x;
    cin>>N;
    for(i=0;i<N;i++)
    {
        int n;
        int x,sum=0;
        cin>>n;
        while(n--)
        {
            cin>>x; 
            sum += x;
        }
        cout<<sum<<endl;
    }
    return 0;
}

6.

Problem Description
Your task is to calculate the sum of some integers.
Input
Input contains multiple test cases, and one case one line. Each case starts with an integer N, and then N integers follow in the same line.
Output
For each test case you should output the sum of N integers in one line, and with one line of output for each line in input.
Sample Input
4 1 2 3 4 5 5 1 2 3 4 5
Sample Output
10 15

#include<iostream>
using namespace std;
int main()
{
    int n;
    int x,sum=0;
    while(cin>>n)
    {   
        while(n--)
        {
            cin>>x;
            sum +=x;
        }
        cout<<sum<<endl;
        sum=0;
    }
    return 0;
}

7.

Problem Description
Your task is to Calculate a + b.
Input
The input will consist of a series of pairs of integers a and b, separated by a space, one pair of integers per line.
Output
For each pair of input integers a and b you should output the sum of a and b, and followed by a blank line.
Sample Input
1 5 10 20
Sample Output
6 30

#include<iostream>
using namespace std;
int main()
{
    int x,y;
    while(cin>>x>>y)
    {
        cout<<x+y<<endl;
        cout<<endl;
    }
    return 0;
}

8.

Problem Description
Your task is to calculate the sum of some integers
Input
Input contains an integer N in the first line, and then N lines follow. Each line starts with a integer M, and then M integers follow in the same line
Output
For each group of input integers you should output their sum in one line, and you must note that there is a blank line between outputs.
Sample Input
3 4 1 2 3 4 5 1 2 3 4 5 6 1 2 3 4 5 6
Sample Output
10 15 21

#include<iostream>
using namespace std;
int main()
{
    int N;
    int n,x;
    int sum=0;
    cin>>N;
    while(N--)
    {
        cin>>n;
        while(n--)
        {
            cin>>x;
            sum +=x; 
        } 
        cout<<sum<<endl;
        cout<<endl;
        sum=0;
    }
    return 0;
}