package update;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.PrintStream;
import java.util.Scanner;
public class complex {
public static void main(String args[]) throws IOException {
System.out.println("生成数量：");
Scanner r=new Scanner(System.in);
int count=r.nextInt();
System.out.println("操作数范围：");
Scanner r1=new Scanner(System.in);
int fanwei=r1.nextInt();
create(count,fanwei);
}
//生成算式
public static void create(int count ,int fanwei) throws IOException {
int[] result=new int[count];
File f=new File("myout.txt");
f.createNewFile();
FileOutputStream fileOutputStream = new FileOutputStream(f);
PrintStream printStream = new PrintStream(fileOutputStream);
int i=0;
for(i=0;i<count;i++) {
int left_number=random( fanwei);
int right_number=random(fanwei);
String operate=fuhao();
if((operate=="-")&&(left_number<right_number)) {
int temp=0;
temp=left_number;
left_number=right_number;
right_number=temp;
}
number num =new number(left_number, operate, right_number);
result[i]=result( count, left_number, right_number, operate);
System.setOut(printStream);
System.out.println(num.left_number+num.operate+num.right_number+"= ,");
}
System.out.println("查看答案0/1(否/是)：");
Scanner r=new Scanner(System.in);
int N=r.nextInt();
if(N==1) {
System.setOut(printStream);
for( i=0;i<count;i++) {
System.out.print(result[i]+",");
}
}
}
//产生随机数
public static int random(int fanwei){
int a=0;
a=(int)(Math.random()*fanwei)+1;
return a;
}
//产生随机符号
public static String fuhao() {
int a=0;
a=(int)(Math.random()*2);
String fuhao = null;
switch(a) {
case 0:fuhao="+";break;
case 1:fuhao="-";break;
}
return fuhao;
}
//计算结果
public static int result(int count,int left_number,int right_number ,String operate) {
int result=0;
if(operate=="+") {
result=left_number+right_number;
}else if(operate=="-") {
result=left_number-right_number;
}
return result;
}
}
package update;
public class number {
int left_number;//左操作数
int right_number;//右操作数
String operate;//符号
public number(int left_number,String operate, int right_number) {
this.left_number=left_number;
this.right_number=right_number;
this.operate=operate;
}
public int getLeft_number() {
return left_number;
}
public void setLeft_number(int left_number) {
this.left_number = left_number;
}
public int getRight_number() {
return right_number;
}
public void setRight_number(int right_number) {
this.right_number = right_number;
}
public String getOperate() {
return operate;
}
public void setOperate(String operate) {
this.operate = operate;
}
}
