foo.cc: In function 'int SetInter(int*, int, int*, int, int*)':
foo.cc:46:6: warning: unused variable 'j' [-Wunused-variable]
   46 |  int j;
      |      ^
foo.cc: In function 'int main()':
foo.cc:66:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   66 |  scanf("%d %d %d", &n1, &n2, &n3);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
foo.cc:72:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   72 |   scanf("%d", &a1[i]);
      |   ~~~~~^~~~~~~~~~~~~~
foo.cc:75:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   75 |   scanf("%d", &a2[i]);
      |   ~~~~~^~~~~~~~~~~~~~
foo.cc:78:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   78 |   scanf("%d", &a3[i]);
      |   ~~~~~^~~~~~~~~~~~~~

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