sumab2.java

来自「JAVA中输入10个数」· Java 代码 · 共 46 行

import java.io.*;

public class Sumab2{
public static void main(String args[]) {
String s="";
int a=0;
int b=0;
try{
BufferedReader in=new BufferedReader(new InputStreamReader(System.in));
System.out.print("please input a int a=");
s=in.readLine();
a=Integer.parseInt(s);
System.out.print("please input another int b=");
s=in.readLine();
b=Integer.parseInt(s);
}catch(IOException e){}
System.out.println("sum for  a to b is");

    int sum=a,i=a;
    System.out.println("\n******for statemen*******");
    
    for (i=a+1;i<=b;i++)
    {
    sum=sum+i;}
    System.out.println("sum for a to b is"+sum);
  

    System.out.println("\n******while statemen******");
     i=a;
    sum=a;
    while(i<b)
    {i=i+1;
     sum=sum+i;}
    System.out.println("sum for a to b is"+sum);
    
    System.out.println("\n******do while statemen******");
    i=a;
    sum=a;
    do
    {
    i=i+1;
    sum=sum+i;
    }while(i<b);
    System.out.println("sum for a to b is"+sum);
    }
}