foo.cc: In function 'int main()':
foo.cc:9:16: warning: format '%d' expects a matching 'int*' argument [-Wformat=]
    9 |  scanf("%d,%d,%d",&a,&b);
      |               ~^
      |                |
      |                int*
foo.cc:9:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    9 |  scanf("%d,%d,%d",&a,&b);
      |  ~~~~~^~~~~~~~~~~~~~~~~~

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