没有编译错误，但代码的输出错误（JCreator）：

Question

Input

t (no of lines), next t lines contains space separated numbers.

Output

The output should return the sum of the numbers in each lines.

Problem

Have coded in JCreater, no compilation error! BUT the desired output is only obtained after uncommenting the commented lines, else the program is terminating abruptly and showing answers to be zero. And it is working only with System.out.println statement, any other bogus syntax is not getting the result!

Code

import java.io.BufferedReader;
import java.io.InputStreamReader;

class TestClass {
    public static void main(String args[] ) throws IOException
    {
        int t=0;
        BufferedReader StdIn = new BufferedReader(new InputStreamReader(System.in));
        try
        {
            String line = StdIn.readLine();
            t = Integer.parseInt(line);
        }
        catch (IOException e) 
        {
            System.err.println("Error: " + e);
        }
        int m=0;
        int result[]= new int [t];
        for(int q=0;q<t;q++)
        {
        //  System.out.println("LOOP: "+q);
            m=fun_num();
            result[q]=m;
        }
        for(int q=0;q<t;q++)
            System.out.println(result[q]);
    }
    public static int fun_num()
    {
        int i=0,o=0,j=0,m=1,s=0,sum=0;
        String inp=null;
        BufferedReader StdIn = new BufferedReader(new InputStreamReader(System.in));
        try
        {
            String line = StdIn.readLine();
            inp=line;
        }
        catch (IOException e) 
        {
            System.err.println("Error: " + e);
        }
        String inp2=" ";
        j=inp.length();
        for(i=0;i<j;i++)
        {
            if (inp.charAt(i)== inp2.charAt(0))
                m++;
        }
        int num_in_order[]= new int [m];
        int num=0;
        for(i=0;i<j;i++)
        {
            if (inp.charAt(i)== inp2.charAt(0))
            {
                num_in_order[s]=num;
                s++;
                num=0;
            }
            else
            {
                o=((int)(inp.charAt(i))-48);
                num=(num*10)+o;
            }
        }
        num_in_order[s]=num;
        for(i=0;i<m;i++)
            sum=sum+num_in_order[i];
        return (sum);
    }
}

Answer 1

I think the very first reader you create (StdIn), is buffering all the input, before the readers in fun_num() get a chance to look at it. Try passing StdIn as a parameter to your "fun_num" function instead of creating it every time.