foo.c: In function 'superprime':
foo.c:7:4: warning: value computed is not used [-Wunused-value]
    7 |   k==sqrt(n);
      |   ~^~~~~~~~~
foo.c: In function 'main':
foo.c:21:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
   21 |  scanf("%d",&m);
      |  ^~~~~~~~~~~~~~
foo.c: In function 'superprime':
foo.c:8:2: warning: 'k' is used uninitialized in this function [-Wuninitialized]
    8 |  for(i=2;i<=k;i++)
      |  ^~~

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