Your task is to Calculate a + b.

一、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 in one line, and with one line of output for each line in input.
Sample Input：
1 5
10 20
Sample Output：
6
30

#include
int main()
{
    int a,b;
    int i=0;
    while(i!=-1)
    {
        scanf("%d%d",&a,&b);
        printf("%d\n",a+b);
        i++;
    }
}

二、
Input：Input contains an integer N in the first line, and then N lines follow. Each line consists of a pair 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：
2
1 5
10 20
Output：
6
30

#include
int main()
{
    int a,b;
    int i,j;
    int n;
    scanf("%d",&n);
    int sum[10]={0};
    for(i=0;i"%d%d",&a,&b);
        sum[i]=a+b;
    }
    for(j=0;jprintf("%d\n",sum[j]);
    }
}

三、
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
int main()
{
    int a,b;
    while(scanf("%d%d",&a,&b)!=EOF)
    {
        if(a==0&&b==0)break;
        //  return ;
        printf("%d\n",a+b);
    }
}

#include 
using namespace std;

int main()
{
    int i,j;
    while ( cin >> i >> j && (i || j )!=0)
        cout << (i + j) << endl;

    return 0;
}

四、
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 
using namespace std;

int main()
{
    int N;
    while(cin >> N && N )
    {
        int sum = 0;
        while (N--)
        {
            int i;
            cin >> i;
            sum += i;
        }
        cout << sum << endl;
    }

    return 0;
}

五、
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 
using namespace std;

int main()
{
    int T;
    cin >> T ;
    while(T--)
    {
        int N,sum = 0;
        cin >> N;
        while (N--)
        {
            int i;
            cin >> i;
            sum += i;
        }
        cout << sum << endl;
    }

    return 0;
}

六、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 1 2 3 4 5

Sample Output
10
15

#include 
using namespace std;

int main()
{
    int N,i;
    while(cin >> N)
    {
        int sum = 0;
        while (N--)
        {
            cin >> i;
            sum += i;
        }
        cout << sum << endl;
    }

return 0;
}

七、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 
using namespace std;

int main()
{
    int i,j;

    while(cin >> i >> j)
        cout << (i + j) << endl << endl;

return 0;
}

八、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
3 1 2 3

Sample Output
10
15
6

#include 
using namespace std;

int main()
{
    int N;
    cin >> N;
    while (N--)
    {
        int M,sum = 0;
        cin >> M;
        while (M--)
        {
            int i;
            cin >> i;
            sum += i;
        }
        cout << sum << endl;
        if (N != 0)cout << endl;//没有此行运行时会出现错误：Presentation Error
    }

return 0;
}