foo.cc: In function 'int main()':
foo.cc:21:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   if(Pos==STR.size())
      ~~~^~~~~~~~~~~~
foo.cc:28:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=Pos;i<STR.size();i++)
                   ~^~~~~~~~~~~
foo.cc:16:7: warning: unused variable 'm' [-Wunused-variable]
   int m=0,n=0,q=0;
       ^
foo.cc:16:11: warning: unused variable 'n' [-Wunused-variable]
   int m=0,n=0,q=0;
           ^
foo.cc:16:15: warning: unused variable 'q' [-Wunused-variable]
   int m=0,n=0,q=0;
               ^
foo.cc:17:7: warning: unused variable 'a' [-Wunused-variable]
   int a=0,b=0,c=0;
       ^
foo.cc:17:11: warning: unused variable 'b' [-Wunused-variable]
   int a=0,b=0,c=0;
           ^
foo.cc:17:15: warning: unused variable 'c' [-Wunused-variable]
   int a=0,b=0,c=0;
               ^

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