ACM Input/Output Method

Input _ Class 1:
The Input does not indicate the number of Input blocks. The End mark is EOF.

Example 1:
Description:

Your task is to calculate a + B

Input

The input contains multiple rows of data. Each row has two integers, a and B, separated by spaces.

Output

For each pair of integers a and B, output their sum. Each sum occupies a row.

Sample Input

1 5

10 20

Sample Output

6

30

 

# Include <stdio. h>

Int main ()

{

Int a, B;

While (scanf ("% d", & a, & B )! = EOF) printf ("% d \ n", a + B );

}

Enter a solution for this category:
C Syntax:

While (scanf ("% d", & a, & B )! = EOF)

{
....
}

C ++ Syntax:

While (cin> a> B)
{
....
}

Note:
1. the return value of the Scanf function is the number of variables read, for example, scanf ("% d", & a, & B );
If there is only one integer input, the return value is 1. If there are two integers, the return value is 2. If none of them exist, the return value is-1.

2. EOF is a predefined constant, which is equal to-1.

Input _ Class 2:
The Input will start with N Input blocks, followed by N Input blocks.

Example 2:
Description:

Your task is to calculate a + B

Input

The input contains multiple rows of data. The first row has an integer N, And the next N rows have two integers a and B, separated by spaces.

Output

For each pair of integers a and B, output their sum. Each sum occupies a row.

Sample Input

2

1 5

10 20

Sample Output

6

30

 

# Include <stdio. h>

Int main ()

{

Int n, I, a, B;

Scanf ("% d", & n );

For (I = 0; I <n; I ++)

{

Scanf ("% d", & a, & B );

Printf ("% d \ n", a + B );

}

}

Enter a solution for this category:
C Syntax:

Scanf ("% d", & n );

For (I = 0; I <n; I ++)
{
....
}

C ++ Syntax:

Cin> n;
For (I = 0; I <n; I ++)
{
....
}

Input _ Category 3:
The Input does not indicate the number of Input blocks, but ends with a special Input.

Example 3:
Description:

Your task is to calculate a + B

Input

The input contains multiple rows of data. Each row has two integers, a and B, separated by spaces. The test data ends at 0.

Output

For each pair of integers a and B, output their sum. Each sum occupies a row.

Sample Input

1 5

10 20

0 0

Sample Output

6

30

 

# Include <stdio. h>

Int main ()

{

Int a, B;

While (scanf ("% d", & a, & B )&&! (A = 0 & B = 0 ))

Printf ("% d \ n", a + B );

}

Enter a solution for this category:
C Syntax:

While (scanf ("% d", & n) & n! = 0)

{
....
}

C ++ Syntax:

While (cin> n & n! = 0)
{
....
}

Input _ Class 4:
Combination of the above situations

Example 4:
Description:

Your task is to calculate the sum of multiple numbers

Input

The input contains multiple rows of data. Each row starts with an integer N, followed by N integers separated by spaces. The test data ends with 0.

Output

Output the sum of N integers in each row. Each sum occupies one row.

Sample Input

4 1 2 3 4

5 1 2 3 4 5

0

Sample Output

10

15