Start the program$2.$ Include the header files$\mathrm{.}3.$ Allocate memory for the variable by dynamic memory allocation function$\mathrm{.}4.$ Use the file accessing functions to read the file$\mathrm{.}5.$ Get the input file from the user$\mathrm{.}6.$ Separate all the file contents as tokens and match it with the functions$\mathrm{.}7.$ Define all the keywords in a separate file and name it as key.c$8.$ Define all the operators in a separate file and name it as open.c$9.$ Give the input program in a file and name it as input.c$10.$ Finally print the output after recognizing all the tokens$\mathrm{.}11.$ Stop the program.