foo.cc: In function 'int main()':
foo.cc:13:17: error: expected ';' before '<' token
   13 |  for(int i = 0,i<n,i++)
      |                 ^
      |                 ;
foo.cc:13:17: error: expected primary-expression before '<' token
foo.cc:13:23: error: expected ';' before ')' token
   13 |  for(int i = 0,i<n,i++)
      |                       ^
      |                       ;
foo.cc:44:18: error: 'null' was not declared in this scope
   44 |  if(marray[0] == null)
      |                  ^~~~
foo.cc:64:21: error: expected ';' before '}' token
   64 |    temp += marray[i]
      |                     ^
      |                     ;
   65 |   }
      |   ~                  

[Hydro](https://hydro.ac)提供评测服务