foo.cc:2:1: error: stray '##' in program
    2 | ##includein  <iostream>
      | ^~
foo.cc:2:3: error: 'includein' does not name a type
    2 | ##includein  <iostream>
      |   ^~~~~~~~~
foo.cc: In function 'int isContain(int)':
foo.cc:15:16: warning: comparison of integer expressions of different signedness: 'int' and 'size_t' {aka 'long unsigned int'} [-Wsign-compare]
   15 |   for(int i=0;i<strlen(s);i++)
      |               ~^~~~~~~~~~
foo.cc: In function 'int main()':
foo.cc:30:2: error: 'cin' was not declared in this scope
   30 |  cin>>A>>B;
      |  ^~~
foo.cc:5:1: note: 'std::cin' is defined in header '<iostream>'; did you forget to '#include <iostream>'?
    4 | #include <cstring>
  +++ |+#include <iostream>
    5 | 
foo.cc:41:2: error: 'cout' was not declared in this scope
   41 |  cout<<temp<<" "<<sum1<<" "<<sum2;
      |  ^~~~
foo.cc:41:2: note: 'std::cout' is defined in header '<iostream>'; did you forget to '#include <iostream>'?

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