A+B Problem Time Limit:1000MS Memory Limit:10000K Total Submit:48745 Accepted:26325 Description Calculate a+b Input Two integer a,b (0<=a,b<=10) Output Output a+b Sample Input 12 Sample Output 3 Hint 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 for problem 1000using C++/G++: #include <iostream> usingnamespace std; int main() ...{ int a,b; cin >> a >> b; cout << a+b << endl; return0; } 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 for problem 1000using C/GCC: #include <stdio.h> int main() ...{ int a,b; scanf("%d %d",&a, &b); printf("%d ",a+b); return0; } Here is a sample solution for problem 1000using PASCAL: program p1000(Input,Output); var a,b:Integer; begin Readln(a,b); Writeln(a+b); end. Here is a sample solution for problem 1000using JAVA: Now java compiler is jdk 1.5, next is program for1000 import java.io.*; import java.util.*; publicclass Main ...{ publicstaticvoid 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.*; publicclass Main ...{ publicstaticvoid 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); } } Source POJ my solution: Source Problem Id:1000 User Id:keepRunning Memory:92K Time:0MS Language:C++ Result:Accepted Source #include<iostream> usingnamespace std; int main( void ) ...{ int a; int b; cin >> a >> b; if( a >=0&& b <=10 ) cout << a + b; else cout <<"error"; return0; }