/in/foo.cc: In function 'int main()':
/in/foo.cc:7:13: error: 'tt' was not declared in this scope; did you mean 't'?
    7 |         for(tt)
      |             ^~
      |             t
/in/foo.cc:38:9: error: expected primary-expression before 'return'
   38 |         return 0;
      |         ^~~~~~
/in/foo.cc:37:19: error: expected ')' before 'return'
   37 |         cout<<sum;
      |                   ^
      |                   )
   38 |         return 0;
      |         ~~~~~~     
/in/foo.cc:7:12: note: to match this '('
    7 |         for(tt)
      |            ^
/in/foo.cc:5:15: warning: unused variable 'a' [-Wunused-variable]
    5 |         int n,a,b,c,sum=0,t=0;
      |               ^
/in/foo.cc:5:17: warning: unused variable 'b' [-Wunused-variable]
    5 |         int n,a,b,c,sum=0,t=0;
      |                 ^
/in/foo.cc:5:19: warning: unused variable 'c' [-Wunused-variable]
    5 |         int n,a,b,c,sum=0,t=0;
      |                   ^
/in/foo.cc:5:27: warning: unused variable 't' [-Wunused-variable]
    5 |         int n,a,b,c,sum=0,t=0;
      |                           ^