Ποια είναι η λειτουργία του ακόλουθου προγράμματος:

            #include<stdio.h>

            main()

            {

                        FILE *pF; char ch;

                        pF=fopen("putc.res","w");

                        if (pF = = NULL) printf("\t\tFILE ERROR: Exit program\n");

                        else

                        {

                                    do

                                    {

                                                ch=getchar();

                                                putc(ch,pF);

                                    }

                                    while (ch!='$');

                        }

                        fclose(pF);

            }