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    <p>I really hope that i understood what you meant. I tried to make a program as you showed here and i came up with this:</p> <p>Macros.h:</p> <pre><code>#ifndef MY_MACROS_H #define MY_MACROS_H #define VALUES(base) \ ADD_VALUE(0,base) \ ADD_VALUE(1,base) \ ADD_VALUE(2,base) \ ADD_VALUE(3,base) \ ADD_VALUE(4,base) \ ADD_VALUE(5,base) \ ADD_VALUE(6,base) \ ADD_VALUE(7,base) \ ADD_VALUE(8,base) \ VALUE(9,base) #define VALUE(val,base) +1 #define ADD_VALUE(val,base) VALUE(val, base) #define DIGIT_COUNT (0 VALUES(1)) #define BASE_COUNT (DIGIT_COUNT + 1) #define ALL_VALUES ADD_ARRAY_VALUES(1) \ ADD_ARRAY_VALUES(BASE_COUNT) \ ADD_ARRAY_VALUES(BASE_COUNT * BASE_COUNT) \ ARRAY_VALUES(BASE_COUNT * BASE_COUNT * BASE_COUNT) #define ARRAY_VALUES(rank) +1 #define ADD_ARRAY_VALUES(rank) ARRAY_VALUES(rank) #define UNKNOWN_LETTER_PATTERN "" #define ARRAYS_COUNT (0 ALL_VALUES) #endif </code></pre> <p>Header.h:</p> <pre><code> #ifndef _MY_HEADER_H #define _MY_HEADER_H /***** * Includes ******/ #include &lt;iostream&gt; #include &lt;string&gt; #include &lt;vector&gt; #include "Macros.h" using namespace std; /***** * Definitions ******/ #define FIRST_LETTER 'a' #define LAST_LETTER 'z' typedef unsigned char byte; typedef int NumberValueType; #define BASE_CHAR_VALUE '0' // character #define CHAR_TO_CHAR_INDEX(character) (character - FIRST_LETTER) #define CHAR_TO_NUM_INDEX(character) (character - BASE_CHAR_VALUE) #define IS_CHAR_VALID(character) ((character &gt;= FIRST_LETTER) &amp;&amp; (character &lt;= LAST_LETTER)) int ParseInput(); string texttopattern(char c); #endif </code></pre> <p>And the implementation file: (of course that i also printed and haven't done anything important with the output).</p> <p>Main.cpp:</p> <pre><code> #include "Header.h" int s_arValues[ARRAYS_COUNT][DIGIT_COUNT] = { #undef VALUE #define VALUE(val,base) (base * val) #undef ADD_VALUE #define ADD_VALUE(val,base) VALUE(val, base), #undef ARRAY_VALUES #define ARRAY_VALUES(rank) { VALUES(rank) } #undef ADD_ARRAY_VALUES #define ADD_ARRAY_VALUES(rank) ARRAY_VALUES(rank), ALL_VALUES }; string texttopattern(char c) { string code[] = {"1","12","14","145", "15", "124", "1245", "125", "24", "245", "13", "123", "134", "1345", "135", "1234", "12345", "1235", "234", "2345", "136", "1236", "1346", "13456", "1356", "12346"}; if (IS_CHAR_VALID(c)) return code[CHAR_TO_CHAR_INDEX(c)]; else return UNKNOWN_LETTER_PATTERN ; } int ParseInput() { string ord; getline(cin, ord); vector&lt;string&gt; code; for(int i=0; i&lt;ord.length(); i++) { code.push_back(texttopattern(tolower(ord[i]))); } // Loop inputs for (vector&lt;string&gt;::iterator itInputs = code.begin(); itInputs != code.end(); itInputs++) { if (*itInputs == UNKNOWN_LETTER_PATTERN) { // Don't know what to do with unknown chars like spaces - your problem cout &lt;&lt; "unknown letter" &lt;&lt; endl; continue; } int number = 0; int nInputSize = itInputs-&gt;size(); // Loop every digit in the current pattern for (int nDigitIndex = 0; nDigitIndex &lt; nInputSize; nDigitIndex++) { if(nDigitIndex &gt;= sizeof(NumberValueType)) { cout &lt;&lt; number; number = 0; continue; } char cChar = itInputs-&gt;at(nDigitIndex); number += s_arValues[nInputSize - nDigitIndex - 1][CHAR_TO_NUM_INDEX(cChar)]; } // At this point you can use number cout &lt;&lt; number; cout &lt;&lt; endl; cout &lt;&lt; "End of letter" &lt;&lt; endl; } cin.get(); return 0; } void main() { ParseInput(); } </code></pre>
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    1. POC++ alphabet equivalent digit code output program
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