四则运算3

设计思想：利用数组将两个随机数分装 分别表示参与运算的数 以及运算的符号，利用条件语句对不同情况下的结果进行计算与用户输入的值进行比较实现对结果的判断，并记录正确的个数 ， 将上述内容放在一个方法中再在main方法中进行调用实现实验要求；
package arithmetic3;
import java.util.Scanner;

public class Arithmetic3 {
      int count; 
          public static void main(String[] args) {
                 Arithmetic3 t=new Arithmetic3();
                     int choose=0;
                       Scanner c=new Scanner(System.in);
                        System.out.println("请进行以下30道四则运算,对于除法正确结果为他的最大商值");
                          System.out.println("请选择要做的试题类型1：两个数的四则运算，2：包含多项式的四则运算");
                            System.out.println("-------------------------------------------------------------");
                              choose=c.nextInt(); 
                            if(choose==1)  
                               {
                                 t.arithmetic();
                               }
                             else if(choose==2)
                             {
                                 t.arithmetic2();
                             }
                             else
                             {
                                 System.out.println("输入选择超出规定范围!");
                             }
                            System.out.println("您一共做对了"+t.count+"道题"); 
    }
          private void arithmetic()
           {
              int j; 
                 int num1[]=new int[50];
                    int mark[]=new int[50];
                       char mark1[]=new char[50];
                         int result1=0,result;
                              Scanner r=new Scanner(System.in);
                                 for(j=1;j<=30;j++)
                       { 
                                    num1[j]=(int)(Math.random()*100);
                                        mark[j]=(int)(Math.random()*4);
                                            if(mark[j]==0)
                                      {
                                                mark1[j]=‘+‘;
                                                  result1=num1[j-1]+num1[j];
                                  }
                                                     else if(mark[j]==1)
                                    {
                                                        mark1[j]=‘-‘;
                                                           result1=num1[j-1]-num1[j];
                                  }
                                                         else if(mark[j]==2)
                                  {
                                                              mark1[j]=‘*‘;
                                                                result1=num1[j-1]*num1[j];
                                  }
                                                                else
                                  {
                                                                   mark1[j]=‘/‘;
                                                                      result1=num1[j-1]/num1[j];
                                  } 
                                         
                                                               System.out.print(num1[j-1]);
                                                                 System.out.print(mark1[j]);
                                                                   System.out.println(num1[j]+"=");
                                                                       result=r.nextInt();
                                                                        if(result==result1)
                                                   {
                                                                         System.out.println("回答正确！");
                                                                          count++;
                                                   }
                                                                        else 
                                                                        {
                                                                            System.out.println("回答错误！");
                                                                        }
                       
                                }

                       }
          private void arithmetic2()
          {
              
               int j,num=3,k; 
                  int num1[]=new int[100];
                     int mark[]=new int[100];
                        char mark1[]=new char[100];
                           int result1=0,result;
                              Scanner r=new Scanner(System.in);
                                 for(j=1;j<=30;j++)
                       { 
                                
                                     for(k=1;k<num;k++)                                     
                                         {
                                         num1[k]=(int)(Math.random()*100);                                         
                                           mark[k-1]=(int)(Math.random()*4);
                                           // num=(int)(Math.random()*5+2);                                                                                                                                              
                                                 if(mark[k]==0)
                                                 
                                      {
                                                   mark1[k]=‘+‘;
                                                     //result1=(num1[k-1]+num1[k])+num1[k+1];
                                  }
                                                     else if(mark[k]==1)
                                    {
                                                        mark1[k]=‘-‘;
                                                          // result1=(num1[k-1]-num1[k])-num1[k+1];
                                  }
                                                         else if(mark[k]==2)
                                  {
                                                              mark1[k]=‘*‘;
                                                               //result1=(num1[k-1]*num1[k])*num1[k+1];
                                  }
                                                                else
                                  {
                                                                   mark1[k]=‘/‘;
                                                                    // result1=(num1[k-1]/num1[k])/num1[k+1];
                                  }                                        
                                    if(mark1[1]==‘+‘&&mark1[2]==‘-‘)
                                        {
                                                  result1=num1[k-1]+num1[k]-num1[k+1];
                                             }
                                      else if(mark1[1]==‘-‘&&mark1[2]==‘+‘)
                                              {
                                                    result1=num1[k-1]-num1[k]+num1[k+1];
                                              }
                                        else if(mark1[1]==‘*‘&&mark1[2]==‘/‘)
                                              {
                                                      result1=(num1[k-1]*num1[k])/num1[k+1];
                                              }
                                          else if(mark1[1]==‘/‘&&mark1[2]==‘*‘)
                                              {
                                                        result1=(num1[k-1]/num1[k])*num1[k+1];
                                              }
                                            else if(mark1[1]==‘+‘&&mark1[2]==‘*‘)
                                              {
                                                          result1=num1[k-1]+(num1[k]*num1[k+1]);
                                              }
                                               else if(mark1[1]==‘*‘&&mark1[2]==‘+‘)
                                              {
                                                            result1=(num1[k-1]*num1[k])+num1[k+1];
                                              }
                                                 else if(mark1[1]==‘+‘&&mark1[2]==‘/‘)
                                              {
                                                               result1=num1[k-1]+(num1[k]/num1[k+1]);
                                              }
                                                   else if(mark1[1]==‘/‘&&mark1[2]==‘+‘)
                                              {
                                                                  result1=(num1[k-1]/num1[k])+num1[k+1];
                                              }
                                                      else if(mark1[1]==‘-‘&&mark1[2]==‘*‘)
                                              {
                                                                     result1=num1[k-1]-(num1[k]*num1[k+1]);
                                              }
                                                        else if(mark1[1]==‘*‘&&mark1[2]==‘-‘)
                                              {
                                                                         result1=(num1[k-1]*num1[k])-num1[k+1];
                                                          }
                                                          else if(mark1[1]==‘-‘&&mark1[2]==‘/‘)
                                              {
                                                                            result1=num1[k-1]-(num1[k]/num1[k+1]);
                                              }
                                                             else if(mark1[1]==‘/‘&&mark1[2]==‘-‘)
                                              {
                                                                               result1=(num1[k-1]/num1[k])-num1[k+1];
                                              }
                                                                else if(mark1[1]==‘+‘&&mark1[2]==‘+‘)
                                              {
                                                                                  result1=num1[k-1]+num1[k]+num1[k+1];
                                              }
                                                                  else if(mark1[1]==‘-‘&&mark1[2]==‘-‘)
                                              {
                                                                                     result1=num1[k-1]-num1[k]-num1[k+1];
                                              }
                                                                     else if(mark1[1]==‘/‘&&mark1[2]==‘/‘)
                                              {
                                                                                        result1=(num1[k-1]/num1[k])/num1[k+1];
                                              }
                                                         else
                                              {
                                                                                           result1=(num1[k-1]*num1[k])*num1[k+1];
                                              }
                                          }
                                                 
                                            if(mark1[1]==‘/‘&&mark1[2]==‘/‘)
                                            {
                                               System.out.print("("+num1[1]+"/"+num1[2]+")"+"/"+num1[3]+"=");    
                                            }
                                            else
                                            {
                                                for(k=1;k<num;k++)
                                            
                                                {           
                                                    System.out.print(num1[k]);                                                
                                                        System.out.print(mark1[k]);
                                                       
                                                }      
                                                          System.out.println(num1[num]+"=");
                                            }
                                                                 result=r.nextInt();
                                                                        if(result==result1)
                                                   {
                                                                         System.out.println("回答正确！");
                                                                          count++;
                                                   }
                                                                        else 
                                                                        {
                                                                            System.out.println("回答错误！");
                                                                        }
                       
                                }

                       }
}

编程总结：对于实现实验要求我觉得最重要的还是对计算，比较，条件的逻辑过程，对程序本身而言将一些方法分装再在住方法中调用会显得条理更加清晰。    

项目计划总结表：日期：2016/3/26

时间记录日志：日期：2016/3/26

缺陷记录日志：日期：2016/3/26