/in/foo.c: In function 'main':
/in/foo.c:5:21: error: 'score' undeclared (first use in this function)
    5 |         scanf("%d",&score);
      |                     ^~~~~
/in/foo.c:5:21: note: each undeclared identifier is reported only once for each function it appears in
/in/foo.c:4:13: warning: unused variable 'n' [-Wunused-variable]
    4 |         int n;
      |             ^