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软件工程个人作业03
package size;
import java.util.Random;
import java.util.Scanner;
public class size {
public static void main(String[] args){
Random rand=new Random();
size b=new size();
System.out.println("请选择：1:2位数运算2:多位数运算");
Scanner input1=new Scanner(System.in);
int c=input1.nextInt();
if(c==1)
{
System.out.println("请选择出题数量:");
Scanner input6=new Scanner(System.in);
int c5=input6.nextInt();
System.out.println("请输入数值范围(最大值)");
Scanner input3=new Scanner(System.in);
int c2=input3.nextInt();
System.out.println("请选择:1:有乘除法2:无乘除法");
Scanner input2=new Scanner(System.in);
int c1=input2.nextInt();
System.out.println("请选择1:加减有负数2:加减无负数");
Scanner input4=new Scanner(System.in);
int c3=input4.nextInt();
System.out.println("请选择:1.除法有余数2.除法无余数");
Scanner input5=new Scanner(System.in);
int c4=input5.nextInt();
for(int m=0;m<c5;m++)
{
char[] a1={‘+‘,‘-‘,‘*‘,‘/‘};
int a=(int)(Math.random()*4);
if(c1==1)//有乘除法
{
if(c3==1&&c4==1)//有负数，有余数
{
if(a1[a]==‘+‘)
{
b.add(c2);
}
else if(a1[a]==‘-‘)
{
b.jian2(c2);
}
else if(a1[a]==‘*‘)
{
b.chen(c2);
}
else if(a1[a]==‘/‘)
{
b.chu1(c2);
}
}
else if(c3==1&&c4==2)//有负数，无余数
{
if(a1[a]==‘+‘)
{
b.add(c2);
}
else if(a1[a]==‘-‘)
{
b.jian2(c2);
}
else if(a1[a]==‘*‘)
{
b.chen(c2);
}
else if(a1[a]==‘/‘)
{
b.chu2(c2);
}
}
else if(c3==2&&c4==2)//无负数，无余数
{
if(a1[a]==‘+‘)
{
b.add(c2);
}
else if(a1[a]==‘-‘)
{
b.jian1(c2);
}
else if(a1[a]==‘*‘)
{
b.chen(c2);
}
else if(a1[a]==‘/‘)
{
b.chu2(c2);
}
}
else if(c3==2&&c4==1)//无负数，有余数
{
if(a1[a]==‘+‘)
{
b.add(c2);
}
else if(a1[a]==‘-‘)
{
b.jian1(c2);
}
else if(a1[a]==‘*‘)
{
b.chen(c2);
}
else if(a1[a]==‘/‘)
{
b.chu1(c2);
}
}
}
else if(c1==2)//无乘除法
{
if(c3==1)
{
b.jian2(c2);
}
else if(c3==2)
{
b.jian1(c2);
}
}
}
}
else if(c==2)
{
System.out.println("请选择出题数量:");
Scanner input6=new Scanner(System.in);
int c5=input6.nextInt();
System.out.println("请输入数值范围(最大值)");
Scanner input3=new Scanner(System.in);
int c2=input3.nextInt();
System.out.println("请选择:1:有乘除法2:无乘除法");
Scanner input2=new Scanner(System.in);
int c1=input2.nextInt();
for(int m=0;m<c5;m++)
{
if(c1==1)//有乘除法
{
char[] a1={‘+‘,‘-‘,‘*‘,‘/‘};
int e1=(int)(Math.random()*4);
int e2=(int)(Math.random()*4);
int e3=(int)(Math.random()*4);
char n1=a1[e1];
char n2=a1[e2];
char n3=a1[e3];
int x1=b.getrandom(c2);
int x2=b.getrandom(c2);
int x3=b.getrandom(c2);
int x4=b.getrandom(c2);
System.out.print(x1);
System.out.print(n1);
System.out.print(x2);
System.out.print(n2);
System.out.print(x3);
System.out.print(n3);
System.out.print(x4);
System.out.print("=");
System.out.println();
}
else if(c1==2)//无乘除法
{
char[] a1={‘+‘,‘-‘};
int e1=(int)(Math.random()*4);
int e2=(int)(Math.random()*4);
int e3=(int)(Math.random()*4);
char n1=a1[e1];
char n2=a1[e2];
char n3=a1[e3];
int x1=b.getrandom(c2);
int x2=b.getrandom(c2);
int x3=b.getrandom(c2);
int x4=b.getrandom(c2);
System.out.print(x1);
System.out.print(n1);
System.out.print(x2);
System.out.print(n2);
System.out.print(x3);
System.out.print(n3);
System.out.print(x4);
System.out.print("=");
System.out.println();
}
}
}
}
public void add(int range)
{
int answer=0;
int x=getrandom(range);
int y=getrandom(range);
System.out.print(x);
System.out.print(‘+‘);
System.out.print(y);
System.out.print("=");
System.out.println();
System.out.println("请输入答案：");
Scanner in2=new Scanner(System.in);
int q=in2.nextInt();
answer= x+ y;
System.out.println(answer);
if(q==answer)
{
System.out.println("回答正确！");
}
else
System.out.println("回答错误！");
}
public void jian1(int range)//无负数
{
int answer=0;
int x=getrandom(range);
int y=getrandom(range);
if( x> y)
{
System.out.print(x);
System.out.print(‘-‘);
System.out.print(y);
System.out.print("=");
System.out.println();
System.out.println("请输入答案：");
Scanner in2=new Scanner(System.in);
int q=in2.nextInt();
answer=x-y;
if(q==answer)
{
System.out.println("回答正确！");
}
else
System.out.println("回答错误！");
}
}
public void jian2(int range)//有负数
{
int answer=0;
int x=getrandom(range);
int y=getrandom(range);
System.out.print(x);
System.out.print(‘-‘);
System.out.print(y);
System.out.print("=");
System.out.println();
System.out.println("请输入答案：");
Scanner in2=new Scanner(System.in);
int q=in2.nextInt();
answer= x- y;
System.out.println(answer);
if(q==answer)
{
System.out.println("回答正确！");
}
else
System.out.println("回答错误！");
}
public void chu1(int range)//有余数
{
int answer=0;
int x=getrandom(range);
int y=getrandom(range);
if(x%y!=0)
{
System.out.print(x);
System.out.print(‘/‘);
System.out.print(y);
System.out.print("=");
System.out.println();
System.out.println("请输入答案：");
Scanner in2=new Scanner(System.in);
int q=in2.nextInt();
int gcd=gcd(x,y);
answer= (x/gcd)/(y/gcd);
System.out.println(answer);
if(q==answer)
{
System.out.println("回答正确！");
}
else
System.out.println("回答错误！");
}
}
public void chu2(int range)//无余数
{
int answer=0;
int x=getrandom(range);
int y=getrandom(range);
if(x%y==0)
{
System.out.print(x);
System.out.print(‘/‘);
System.out.print(y);
System.out.print("=");
System.out.println();
System.out.println("请输入答案：");
Scanner in2=new Scanner(System.in);
int q=in2.nextInt();
int gcd=gcd(x,y);
answer= (x/gcd)/(y/gcd);
System.out.println(answer);
if(q==answer)
{
System.out.println("回答正确！");
}
else
System.out.println("回答错误！");
}
}
public void chen(int range)
{
int answer=0;
int x=getrandom(range);
int y=getrandom(range);
System.out.print(x);
System.out.print(‘*‘);
System.out.print(y);
System.out.print("=");
System.out.println();
System.out.println("请输入答案：");
Scanner in2=new Scanner(System.in);
int q=in2.nextInt();
answer= x*y;
System.out.println(answer);
if(q==answer)
{
System.out.println("回答正确！");
}
else
System.out.println("回答错误！");
}
public int getrandom(int c2)
{
int x=(int) ( Math.random() * c2 );
return x;
}
public int gcd(int x,int y)
{
int smaller=y>x?y:x;
int i1=1;
for(int i=1;i<smaller;i++)
{
if(y%i==0&&x%i==0)
{
i1=i;
}
}
return i1;
}
}
设计思想：根据上周进度在进行改正，离理想目标还有很远。
软件工程个人作业03
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