foo.cc: In function 'int main()':
foo.cc:7:2: error: 'cin' was not declared in this scope
    7 |  cin>>high>>n;
      |  ^~~
foo.cc:2:1: note: 'std::cin' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
    1 | #include<cmath>
  +++ |+#include <iostream>
    2 | using  namespace  std;
foo.cc:14:2: error: 'printf' was not declared in this scope
   14 |  printf("%.2f",s);
      |  ^~~~~~
foo.cc:2:1: note: 'printf' is defined in header '<cstdio>'; did you forget to '#include <cstdio>'?
    1 | #include<cmath>
  +++ |+#include <cstdio>
    2 | using  namespace  std;

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