/in/foo.cc: In function 'int main()':
/in/foo.cc:11:11: warning: unused variable 'x' [-Wunused-variable]
 int a,b,n,x,y,k=0,count=0;
           ^
/in/foo.cc:11:13: warning: unused variable 'y' [-Wunused-variable]
 int a,b,n,x,y,k=0,count=0;
             ^
/in/foo.cc:11:15: warning: unused variable 'k' [-Wunused-variable]
 int a,b,n,x,y,k=0,count=0;
               ^
/in/foo.cc:11:19: warning: unused variable 'count' [-Wunused-variable]
 int a,b,n,x,y,k=0,count=0;
                   ^~~~~