21000_A+BProble

Calculate a+b

Two integer a, b  ( 0 ≤ a, b ≤ 10 )

Output a+b

1 2

3

Q: Where are the input and the output?

A: Your program shall always read input from stdin (Standard Input) and write output to stdout (Standard Output). For example, you can use 'scanf' in C or 'cin' in C++ to read from stdin, and use 'printf' in C or 'cout' in C++ to write to stdout.

You shall not output any extra data to standard output other than that required by the problem, otherwise you will get a "Wrong Answer".

User programs are not allowed to open and read from/write to files. You will get a "Runtime Error" or a "Wrong Answer"if you try to do so.

Here is a sample solution to problem 21000 using C++/G++:
#include <iostream>
using namespace std;

int main()
{
   int a,b;
   cin >> a >> b;
   cout << a+b << endl;
   return 0;
}

It's important that the return type of main() must be int when you use G++/GCC,or you may get compile error.

Here is a sample solution to problem 21000 using C/GCC:

#include <stdio.h>
int main()
{
   int a,b;
   scanf("%d %d",&a, &b);
   printf("%d\n",a+b);
   return 0;
}

Here is a sample solution to problem 21000 using Pascal:

program p1000(Input,Output);
    var  a,b:Integer;
begin
   Readln(a,b);
   Writeln(a+b);
end.

Here is a sample solution to problem 21000 using Java:

Now java compiler is jdk 1.5, next is program for 21000

import java.io.*;
import java.util.*;
public class Main{
    public static void main(String args[]) throws Exception
    {
        Scanner cin=new Scanner(System.in);
        int a=cin.nextInt(), b=cin.nextInt();
        System.out.println(a+b);
    }
}

Old program for jdk 1.4

import java.io.*;
import java.util.*;
public class Main{
    public static void main (String args[]) throws Exception
    {
        BufferedReader stdin = new BufferedReader( new InputStreamReader(System.in) );
        String line = stdin.readLine();
        StringTokenizer st = new StringTokenizer(line);
        int a = Integer.parseInt(st.nextToken());
        int b = Integer.parseInt(st.nextToken());
        System.out.println(a+b);
    }
}

Here is a sample solution to problem 21000 using Fortran:

PROGRAM P1000
   IMPLICIT NONE
   INTEGER :: A, B
   READ(*,*) A, B
   WRITE(*, "(I0)") A + B
END PROGRAM P1000

请勿提交本题。