Why would you want a C-interpreter? For scripting? Why use C-syntax for scripting? Better to use Python, Ruby etc.
The only valid reason, it seems to me, is to teach C (or C++). I remember Al Stevens writing Quincy for that purpose in 1994.
CH and CINT are available as interpreters today.
when we write a c program,it is compiled i.e, for example in turbo c we use alt +F9 to compile whereas ctrl+F7 to execute .then it is checked for runtime errors???