foo.c: In function 'main':
foo.c:8:17: warning: unused variable 'k' [-Wunused-variable]
   int n,x,k1,i1,k;
                 ^
foo.c:8:9: warning: unused variable 'x' [-Wunused-variable]
   int n,x,k1,i1,k;
         ^
foo.c:9:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
  ^~~~~~~~~~~~~~
foo.c:10:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&i1);
  ^~~~~~~~~~~~~~~
foo.c:15:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&k1); 
  ^~~~~~~~~~~~~~~

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