编译信息

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        /tmp/compiler_2n_ohbk6/src:9:20: 错误：程序中有游离的'\342'
        
         ls[j][n−i+1]=yuan[i][j];
         
                ^
                

/tmp/compiler_2n_ohbk6/src:9:21: 错误：程序中有游离的‘\210’

         ls[j][n−i+1]=yuan[i][j];
         
                 ^
                 

/tmp/compiler_2n_ohbk6/src:9:22: 错误：程序中有游离的‘\222’

         ls[j][n−i+1]=yuan[i][j];
         
                  ^
                  

/tmp/compiler_2n_ohbk6/src:18:17: 错误：程序中有游离的‘\342’

         ls[n−i+1][n−j+1]=yuan[i][j];
         
             ^
             

/tmp/compiler_2n_ohbk6/src:18:18: 错误：程序中有游离的‘\210’

         ls[n−i+1][n−j+1]=yuan[i][j];
         
              ^
              

/tmp/compiler_2n_ohbk6/src:18:19: 错误：程序中有游离的‘\222’

         ls[n−i+1][n−j+1]=yuan[i][j];
         
               ^
               

/tmp/compiler_2n_ohbk6/src:18:26: 错误：程序中有游离的‘\342’

         ls[n−i+1][n−j+1]=yuan[i][j];
                      ^
                      

/tmp/compiler_2n_ohbk6/src:18:27: 错误：程序中有游离的‘\210’

         ls[n−i+1][n−j+1]=yuan[i][j];
                       ^
                       

/tmp/compiler_2n_ohbk6/src:18:28: 错误：程序中有游离的‘\222’

         ls[n−i+1][n−j+1]=yuan[i][j];

^

/tmp/compiler_2n_ohbk6/src:27:17: 错误：程序中有游离的‘\342’

         ls[n−j+1][i]=yuan[i][j];
         
             ^
             

/tmp/compiler_2n_ohbk6/src:27:18: 错误：程序中有游离的‘\210’

         ls[n−j+1][i]=yuan[i][j];
         
              ^
              

/tmp/compiler_2n_ohbk6/src:27:19: 错误：程序中有游离的‘\222’

         ls[n−j+1][i]=yuan[i][j];
         
               ^
               

/tmp/compiler_2n_ohbk6/src:36:20: 错误：程序中有游离的‘\342’

         ls[i][n−j+1]=yuan[i][j];
              
              ^
              

/tmp/compiler_2n_ohbk6/src:36:21: 错误：程序中有游离的‘\210’

         ls[i][n−j+1]=yuan[i][j];
         
                 ^
                 

/tmp/compiler_2n_ohbk6/src:36:22: 错误：程序中有游离的‘\222’

         ls[i][n−j+1]=yuan[i][j];
         
                  ^
                  

/tmp/compiler_2n_ohbk6/src: 在函数‘bool first()’中: /tmp/compiler_2n_ohbk6/src:9:20: 错误：expected ‘]’ before ‘i’

         ls[j][n−i+1]=yuan[i][j];
         
                ^  ~
                
                ]
                

/tmp/compiler_2n_ohbk6/src:9:20: 错误：expected ‘;’ before ‘i’

         ls[j][n−i+1]=yuan[i][j];
         
                ^  ~
                
                ;
                

/tmp/compiler_2n_ohbk6/src:9:23: 警告：语句不起作用

[-Wunused-value]

         ls[j][n−i+1]=yuan[i][j];
         
         ~~~~~~~~~~^
         

/tmp/compiler_2n_ohbk6/src: 在函数‘bool second()’中:

/tmp/compiler_2n_ohbk6/src:18:17: 错误：expected ‘]’ before ‘i’

         ls[n−i+1][n−j+1]=yuan[i][j];
         
             ^  ~
             
             ]
             

/tmp/compiler_2n_ohbk6/src:18:17: 错误：expected ‘;’ before ‘i’

         ls[n−i+1][n−j+1]=yuan[i][j];
         
             ^  ~
             
             ;
             

/tmp/compiler_2n_ohbk6/src:18:20: 警告：语句不起作用 [-Wunused-value]

         ls[n−i+1][n−j+1]=yuan[i][j];
         
         ~~~~~~~^

/tmp/compiler_2n_ohbk6/src: 在函数‘bool third()’中:

/tmp/compiler_2n_ohbk6/src:27:17: 错误：expected ‘]’ before ‘j’

         ls[n−j+1][i]=yuan[i][j];
         
             ^  ~
             
             ]
             

/tmp/compiler_2n_ohbk6/src:27:17: 错误：expected ‘;’ before ‘j’

         ls[n−j+1][i]=yuan[i][j];
             ^  ~
             
             ;
             

/tmp/compiler_2n_ohbk6/src:27:20: 警告：语句不起作用 [-Wunused-value]

         ls[n−j+1][i]=yuan[i][j];
         
         ~~~~~~~^
         

/tmp/compiler_2n_ohbk6/src: 在函数‘bool fourth()’中:

/tmp/compiler_2n_ohbk6/src:36:20: 错误：expected ‘]’ before ‘j’

         ls[i][n−j+1]=yuan[i][j];
         
                ^  ~
                
                ]
                

/tmp/compiler_2n_ohbk6/src:36:20: 错误：expected ‘;’ before ‘j’

         ls[i][n−j+1]=yuan[i][j];
         
                ^  ~
                
                ;
                

/tmp/compiler_2n_ohbk6/src:36:23: 警告：语句不起作用 [-Wunused-value]

         ls[i][n−j+1]=yuan[i][j];
         
         ~~~~~~~~~~^
         
         
         编译信息愣是没看懂，有人能解释一下吗？