课堂小测三

终于把补丁打好了，虽然说参考了一下他们的，过程也有些小曲折，但是终终终终终终终终终终终终终终于写完了。

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import java.util.*;
import java.io.*;
 
 
public class two_3 {
 
        static  Scanner scanner = new Scanner(System.in);
        static File file = new File("D:/input.txt");
        static String result = new String();//储存读取的内容
         
         public static void main(String[] args) throws IOException {
              
                 
                if (file.exists())
                { // 检查input.txt是否存在
                    System.out.println("File already exists");
             
                }
                else
                {   
                    System.out.println("File don't exists");
                     
                }
             
             
                 
                 
                 
          
                 FileInputStream f1= new FileInputStream(file);
                
                 
                int length=0;
                int length_2=0 ;
                 
             
                //将数字和符号储存在String中
                for(int i=0;i<file.length();i++) {
                    char ch=(char)(f1.read());//循环读取文本里的字符
                    if(ch!='\r' &&ch!='\n') {
                    if(ch!=',' && ((ch>='0'&& ch<='9') || ch=='-')) {
                        result+=ch;         
                    }
                    //补丁节点1
                    else if (ch!=',' && ((ch<='0'|| ch>='9') || ch!='-')) {
                        System.out.print("数据格式有误");
                        System.exit(1);
                    }
                    else {
                        result+=" ";
                    }
                     
                }
                    }
                 
                         
                f1.close();
                
                System.out.println(result);             
                 
                 
                 
 
                 
         
                //str字符串数组储存每个数
                String[] str=new String[10010];
 
                str[0]="";
                 
                for(int j=0,i=0;j<result.length();j++) {
                    if (result.charAt(j)!=' ')
                        str[i]+=result.charAt(j);
                    else {
                         
                        str[++i]="";
                    }
                }
 
                 
                  char c = result.charAt(0);
                  length=(int)c-48;
                  char d = result.charAt(2);
                  length_2=(int)d-48;
                   
                
                //补丁节点2
 
                if (length==0) {
                    System.out.print("数据格式有误");
                    System.exit(1);
                }
                //补丁节点3
                for (int i = 2;i<length_2;i++) {
                    if(str[i].length()>=8) {
                        System.out.print("数字过大，不符合标准");
                        System.exit(1);
                    }
                }
                 
                 
                 
                 
                 
                 
 
                   
           
 
                   
                int tempInt[][] = new int[length][length_2];
                 
                int max = 0;
                int tempMax = 0;//当前最大值
                int n = 4;
                int flag='-'-48;
                 
                 
                 
                 
                 
                for (int i = 0; i < length; i++) {
                    for(int j=0;j<length_2;j++) {
                        int o = j+i*length_2+2;
                     
                    tempInt[i][j] =Integer.parseInt(str[o]);//Integer.parseInt可以将string字符串转换为int类型
                   
                  System.out.println(tempInt[i][j]);
                          
                    if (i==0&&j == 0) {//第一个是元素
                        tempMax = tempInt[i][j];
                        max = tempInt[i][j];
                    } else {
                        if (tempMax < 0) {
                            tempMax = tempInt[i][j];
                        } else {
                            tempMax += tempInt[i][j];
                        }
                    }
 
                    if (tempMax > max) {
                        max = tempMax;
                    }
                    n=n+2;
                   
                }
                
 
            }
                System.out.println("结果是：*********");
                System.out.println(max);
        }
     
}