c++ - Trying to Minimize Repetitive code in Zip-to-Barcode program -

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first time posting here if i'm doing wrong let me know...new whole programming thing.

so in class doing zip bar code converter program. have program running fine , trying cut down on redundant or repetitive coding. instance function runs actual compiling of zip code bar code have 5 switch statements run same exact cases. difference condition switch (digita, b, c, d, e; digits of zip code):

// short zip code converter function int zip_to_bar(int digita, int  digitb, int digitc, int  digitd, int digite)  {     int sum;     string bar_code = "!", check_code;     switch(digita)     {         case 0: bar_code += "!!..."; break;         case 1: bar_code += "...!!"; break;         case 2: bar_code += "..!.!"; break;         case 3: bar_code += "..!!."; break;         case 4: bar_code += ".!..!"; break;         case 5: bar_code += ".!.!."; break;         case 6: bar_code += ".!!.."; break;         case 7: bar_code += "!...!"; break;         case 8: bar_code += "!..!."; break;         case 9: bar_code += "!.!.."; break;     }     switch(digitb)     {         case 0: bar_code += "!!..."; break;         case 1: bar_code += "...!!"; break;         case 2: bar_code += "..!.!"; break;         case 3: bar_code += "..!!."; break;         case 4: bar_code += ".!..!"; break;         case 5: bar_code += ".!.!."; break;         case 6: bar_code += ".!!.."; break;         case 7: bar_code += "!...!"; break;         case 8: bar_code += "!..!."; break;         case 9: bar_code += "!.!.."; break;     }     switch(digitc)     {         case 0: bar_code += "!!..."; break;         case 1: bar_code += "...!!"; break;         case 2: bar_code += "..!.!"; break;         case 3: bar_code += "..!!."; break;         case 4: bar_code += ".!..!"; break;         case 5: bar_code += ".!.!."; break;         case 6: bar_code += ".!!.."; break;         case 7: bar_code += "!...!"; break;         case 8: bar_code += "!..!."; break;         case 9: bar_code += "!.!.."; break;     }     switch(digitd)     {         case 0: bar_code += "!!..."; break;         case 1: bar_code += "...!!"; break;         case 2: bar_code += "..!.!"; break;         case 3: bar_code += "..!!."; break;         case 4: bar_code += ".!..!"; break;         case 5: bar_code += ".!.!."; break;         case 6: bar_code += ".!!.."; break;         case 7: bar_code += "!...!"; break;         case 8: bar_code += "!..!."; break;         case 9: bar_code += "!.!.."; break;     }     switch(digite)     {         case 0: bar_code += "!!..."; break;         case 1: bar_code += "...!!"; break;         case 2: bar_code += "..!.!"; break;         case 3: bar_code += "..!!."; break;         case 4: bar_code += ".!..!"; break;         case 5: bar_code += ".!.!."; break;         case 6: bar_code += ".!!.."; break;         case 7: bar_code += "!...!"; break;         case 8: bar_code += "!..!."; break;         case 9: bar_code += "!.!.."; break;     }     // sum of zip_digits     sum = (digita + digitb + digitc + digitd + digite);     // calculation of check_digit_code     check_code = check_digit_code(sum);     // assignment of check_bar_code check_digit_code     cout << bar_code + check_code << endl;     return sum; }

i somehow minimize 1 switch statement since same , run each digit in loop. reason wanting having run short(#####), standard (#####-####), & advanced (#####-####+##) format zip codes. can imagine program getting hellishly long , repetitive looking.

i thinking statement loop work nicely i'm stuck on what/how set conditions (what should initialized when have 5 variables present in function?). have got not going work how want have far (any advice on how handle problem)?

    // reformatted version of short zip code converter function     int zip_to_bar_srt(int digita, int digitb, int digitc, int  digitd, int digite) {      for(int digita; digita < 5; digita++)     {         switch(digita)         {             int sum;             string barcode = "!", check_bar;              case 0: barcode += "!!..."; break;             case 1: barcode += "...!!"; break;             case 2: barcode += "..!.!"; break;             case 3: barcode += "..!!."; break;             case 4: barcode += ".!..!"; break;             case 5: barcode += ".!.!."; break;             case 6: barcode += ".!!.."; break;             case 7: barcode += "!...!"; break;             case 8: barcode += "!..!."; break;             case 9: barcode += "!.!.."; break;                  sum += digita;                 check_bar = check(sum);                 cout<<barcode+check_bar<<endl;                 return sum;         }     } }

make function give part of barcode single digit:

string get_barcode_part(int digit) {     switch(digita)     {         case 0: return "!!...";;         case 1: return "...!!";;         case 2: return "..!.!";;         case 3: return "..!!.";;         case 4: return ".!..!";;         case 5: return ".!.!.";;         case 6: return ".!!..";;         case 7: return "!...!";;         case 8: return "!..!.";;         case 9: return "!.!..";;         default: return "invalid"; // or whatever else want     } }

then can call each of digits:

// short zip code converter function int zip_to_bar(int digita, int  digitb, int digitc, int  digitd, int digite) {     int sum;     string bar_code = "!", check_code;      bar_code += get_barcode_part(digita);     bar_code += get_barcode_part(digitb);     bar_code += get_barcode_part(digitc);     bar_code += get_barcode_part(digitd);     bar_code += get_barcode_part(digite);      // sum of zip_digits     sum = (digita + digitb + digitc + digitd + digite);     // calculation of check_digit_code     check_code = check_digit_code(sum);     // assignment of check_bar_code check_digit_code     cout << bar_code + check_code << endl;     return sum; }

this essential function of functions (heh): refactor , reduce copied code, putting common functionality in common place.

edit: in addition, should use array digits, so:

// short zip code converter function int zip_to_bar(int *digits, int numdigits) {     int sum = 0;     string bar_code = "!", check_code;      (int = 0; < numdigits; i++)     {         bar_code += get_barcode_part(digits[i]);         // sum of zip_digits         sum += digits[i];     }      // calculation of check_digit_code     check_code = check_digit_code(sum);     // assignment of check_bar_code check_digit_code     cout << bar_code + check_code << endl;     return sum; }

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