foo.c: In function 'main':
foo.c:9:12: warning: format '%d' expects argument of type 'int', but argument 2 has type 'int *' [-Wformat=]
    9 |   printf("%d,%d",&n,&k);
      |           ~^     ~~
      |            |     |
      |            int   int *
      |           %ls
foo.c:9:15: warning: format '%d' expects argument of type 'int', but argument 3 has type 'int *' [-Wformat=]
    9 |   printf("%d,%d",&n,&k);
      |              ~^     ~~
      |               |     |
      |               int   int *
      |              %ls
foo.c:16:5: error: 'temp' undeclared (first use in this function)
   16 |     temp=a[j];
      |     ^~~~
foo.c:16:5: note: each undeclared identifier is reported only once for each function it appears in
foo.c:21:6: error: 'i' undeclared (first use in this function)
   21 |  for(i=0;i<n;++)
      |      ^
foo.c:21:16: error: expected expression before ')' token
   21 |  for(i=0;i<n;++)
      |                ^

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