foo.cc: In function 'int main()':
foo.cc:5:9: error: 'scanf' was not declared in this scope
    5 |         scanf("%d,%d,%d",&x,&y,&z);
      |         ^~~~~
foo.cc:7:9: error: 'printf' was not declared in this scope
    7 |         printf("%.2f",h);
      |         ^~~~~~
foo.cc:1:1: note: 'printf' is defined in header '<cstdio>'; did you forget to '#include <cstdio>'?
  +++ |+#include <cstdio>
    1 | int main()

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