foo.cc: In function 'int main()':
foo.cc:9:11: warning: format '%lf' expects argument of type 'double*', but argument 2 has type 'db' {aka 'double'} [-Wformat=]
    9 |  scanf("%lf,%lf,%c",a,b,c);
      |         ~~^         ~
      |           |         |
      |           double*   db {aka double}
foo.cc:9:15: warning: format '%lf' expects argument of type 'double*', but argument 3 has type 'db' {aka 'double'} [-Wformat=]
    9 |  scanf("%lf,%lf,%c",a,b,c);
      |             ~~^       ~
      |               |       |
      |               double* db {aka double}
foo.cc:9:18: warning: format '%c' expects argument of type 'char*', but argument 4 has type 'int' [-Wformat=]
    9 |  scanf("%lf,%lf,%c",a,b,c);
      |                 ~^      ~
      |                  |      |
      |                  char*  int
foo.cc:9:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    9 |  scanf("%lf,%lf,%c",a,b,c);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~
foo.cc:9:7: warning: 'c' is used uninitialized in this function [-Wuninitialized]
    9 |  scanf("%lf,%lf,%c",a,b,c);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~~
foo.cc:9:7: warning: 'a' is used uninitialized in this function [-Wuninitialized]
foo.cc:9:7: warning: 'b' is used uninitialized in this function [-Wuninitialized]

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