View Compilation Error

0_0_30450838_4200.cpp: In function 'int main()':
0_0_30450838_4200.cpp:11:20: error: 'tong' was not declared in this scope
             memset(tong,0,sizeof(tong));
                    ^
0_0_30450838_4200.cpp:17:18: error: 'ji' was not declared in this scope
             else{ji++;}
                  ^
0_0_30450838_4200.cpp:19:12: error: 'ji' was not declared in this scope
         if(ji>=ou){
            ^