sum_dowhile.java

JAVA用函数实现四则运算

public class Sum_dowhile
{
    public static void main(String args[])
    {
        int i=1,n=10,s=0;
        do 
        {
            s = s + i;
            i++;
        } while (i<=n);
        System.out.println("Sum = 1+...+"+n+" = "+s);
        
        i=1;
        s=0;
        do
            s += i++;
        while (i>=n);			//循环体执行一次
        System.out.println("Sum = 1+...+"+n+" = "+s);
        

    }  //main
}  //class

/*
Sum = 1+...+10 = 55
Sum = 1+...+10 = 1
     
	int i=1,n=10,s=0;
	while (i<=n)				// 死循环
    	    s = s + i;

        int i=1,n=10,s=0;
        do 
        {
            s = s + i;
            i++;
        } while (i>=0);				// 死循环

*/