/in/foo.cc: In function 'int main()':
/in/foo.cc:10:14: warning: unused variable 'sum' [-Wunused-variable]
  int i,j=0,x,sum=0,t=0,s;
              ^~~
/in/foo.cc:10:20: warning: unused variable 't' [-Wunused-variable]
  int i,j=0,x,sum=0,t=0,s;
                    ^
/in/foo.cc:10:24: warning: unused variable 's' [-Wunused-variable]
  int i,j=0,x,sum=0,t=0,s;
                        ^