阅读下列程序并完成程序填空。
题目：输入三个整数x,y,z，请把这三个数由小到大输出。
__________ java.util.*;
public class lianxi15 {
public static void main(String[] args) {
input fnc = new input();
int x=0, y=0, z=0;
System.out.print("输入第一个数字：");
x = fnc.input();
System.out.print("输入第二个数字：");
y = fnc.input();
System.out.print("输入第三个数字：");
z = fnc.input();
if(x > y) {
int t = x;
x = y;
y = t;
}
if(x > z) {
int t = x;
x = z;
z = t;
}
if(y > z) {
int t = y;
y = z;
z = t;
}
System.out.println( "三个数字由小到大排列为： "+x + " " + y + " " + z);
}
}
class input{
public int input() {
int value = 0;
Scanner s = new Scanner(System.in);
value = s.nextInt();
return value;
}
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