foo.c: In function 'main':
foo.c:5:10: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'int' [-Wformat=]
    5 |  scanf("%d",num);
      |         ~^  ~~~
      |          |  |
      |          |  int
      |          int *
foo.c:35:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   35 |     if(num==2);
      |     ^~
foo.c:36:7: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   36 |       printf("No\n");
      |       ^~~~~~
foo.c:5:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
    5 |  scanf("%d",num);
      |  ^~~~~~~~~~~~~~~
foo.c:5:2: warning: 'num' is used uninitialized in this function [-Wuninitialized]
    5 |  scanf("%d",num);
      |  ^~~~~~~~~~~~~~~

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