import java.util.Random ;
//ps:<<java编程思想(第四版)>>第四章,练习2
//题:写一个程序,产生25个int类型的随机数.对于每一个随机值,使用if-else语句来将其分类为大于、大于,或等于紧随它而随机生成的值.
//书中的答案是错的,这是我的代码,希望能对比我还新的新人有些帮助吧。
public class Demo06
{
public static void main(String args[]){
Random rand=new Random() ;
int x=rand.nextInt() ;
int y=0 ;
for(int i=0;i<24;i++){
if(i==0){
y=rand.nextInt();
if(x>y)System.out.print(x+" > "+y) ;
else if(x<y)System.out.print(x+" < "+y) ;
else System.out.print(x+" = "+y) ;
x=y ;
}else{
y=rand.nextInt();
if(x>y)System.out.print(" > "+y) ;
else if(x<y)System.out.print(" < "+y);
else System.out.print(" = "+y);
x=y ;
}
}
}
}
没有这句引入,不能执行吧
// TIJ4 Chapter Control, Exercise 2, page 139
/* Write a program that generates 25 random int values. For each value, use an
* if-else statement to classify it as greater than, less than or equal to a
* second randomly generated value.
*/import static net.mindview.util.Print.*;
import java.util.*;public class CompareInts {
public static void main(String[] args) {
Random rand1 = new Random();
Random rand2 = new Random();
for(int i = 0; i < 25; i++) {
int x = rand1.nextInt();
int y = rand2.nextInt();
if(x < y) print(x + " < " + y);
else if(x > y) print(x + " > " + y);
else print(x + " = " + y);
}
Random rand3 = new Random();
Random rand4 = new Random();
for(int i = 0; i < 25; i++) {
int x = rand3.nextInt(10);
int y = rand4.nextInt(10);
if(x < y) print(x + " < " + y);
else if(x > y) print(x + " > " + y);
else print(x + " = " + y);
}
}
}
public class Test {
public static void main(String[] args) {
new Test().random25(0, 1);
}
public void random25(int last,int times) {
Random ran = new Random();
int now = ran.nextInt();
System.out.println(times + ": last=" + last +" now=" + now + " " + compare(last, now));
if(times == 25)
return;
else
random25(now, ++times);
}
private String compare(int i1,int i2) {
if(i1 > i2)
return "大于";
else if(i1 == i2)
return "等于";
else
return "小于";
}
}
:)
只需要这样写就完了,我觉得是符合题意的~!import java.util.*;
import static net.mindview.util.Print.*;public class CompareInts {
public static void main(String[] args) {
// Create a seeded random number generator:
Random rand = new Random();
int j = rand.nextInt(100);
for(int i = 0; i< 24; i++){
int k = rand.nextInt(100);
if(j < k)print(j +"<"+ k);
else if(j == k)print(j +"="+ k);
else print(j +">"+ k);
j = k;
}
}
}