/in/foo.c: In function 'main':
/in/foo.c:6:14: warning: format '%d' expects argument of type 'int', but argument 2 has type 'int *' [-Wformat=]
     printf("%d",&n);
              ^
/in/foo.c:5:11: warning: unused variable 'j' [-Wunused-variable]
     int i,j,n;
           ^