/in/foo.cc: In function 'int main()':
/in/foo.cc:8:5: error: expected initializer before 'while'
     while(cin>>c)
     ^~~~~
/in/foo.cc:5:9: warning: unused variable 'a' [-Wunused-variable]
     int a=0,b=0;
         ^
/in/foo.cc:5:13: warning: unused variable 'b' [-Wunused-variable]
     int a=0,b=0;
             ^
/in/foo.cc:6:10: warning: unused variable 'c' [-Wunused-variable]
     char c;
          ^
/in/foo.cc:26:1: error: expected '}' at end of input
 }
 ^