Main.cc:1:9: error: #include expects "FILENAME" or
#include#include
^
Main.cc: In function 'int main()':
Main.cc:7:6: error: 'cin' was not declared in this scope
cin>>n;
^
Main.cc:10:24: error: 'printf' was not declared in this scope
printf("%.2lf",s/12);
^