• Source 
    1. //#include "Hex.h"
    2. #include <iostream>
    3. #include <string.h>
    4. #include <stdio.h>
    5. #include <vector>
    6. #include <string.h>
    7.  
    8. using namespace std;
    9. class Hex {
    10.  
    11. public:
    12.     void HexToBin(string s);
    13. private:
    14.     vector<char> binum;
    15.     vector<char> word;
    16.     vector<int>::const_iterator i;
    17. };
    18. #include <iostream>
    19.  
    20. void Hex::HexToBin(string hex) {
    21.     {
    22.         //vector<char> binnum;
    23.         vector<char> word(begin(hex), end(hex));
    24.         vector<char>::iterator i;
    25.         i = word.begin();
    26.         while (i != word.end())
    27.         {
    28.             switch (*i) //error here 
    29.             {
    30.             case '0': cout << "0000";
    31.                 binum.push_back(0);
    32.                 binum.push_back(0);
    33.                 binum.push_back(0);
    34.                 binum.push_back(0);
    35.                 break;
    36.             case '1': cout << "0001";
    37.                 binum.push_back(0);
    38.                 binum.push_back(0);
    39.                 binum.push_back(0);
    40.                 binum.push_back(1);
    41.                 break;
    42.             case '2': cout << "0010";
    43.                 binum.push_back(0);
    44.                 binum.push_back(0);
    45.                 binum.push_back(1);
    46.                 binum.push_back(0);
    47.                 break;
    48.             case '3': cout << "0011";
    49.                 binum.push_back(0);
    50.                 binum.push_back(0);
    51.                 binum.push_back(1);
    52.                 binum.push_back(1);
    53.                 break;
    54.             case '4': cout << "0100";
    55.                 binum.push_back(0);
    56.                 binum.push_back(1);
    57.                 binum.push_back(0);
    58.                 binum.push_back(0);
    59.                 break;
    60.             case '5': cout << "0101";
    61.                 binum.push_back(0);
    62.                 binum.push_back(1);
    63.                 binum.push_back(0);
    64.                 binum.push_back(1);
    65.                 break;
    66.             case '6': cout << "0110";
    67.                 binum.push_back(0);
    68.                 binum.push_back(1);
    69.                 binum.push_back(1);
    70.                 binum.push_back(0);
    71.                 break;
    72.             case '7': cout << "0111";
    73.                 binum.push_back(0);
    74.                 binum.push_back(1);
    75.                 binum.push_back(1);
    76.                 binum.push_back(1);
    77.                 break;
    78.             case '8': cout << "1000";
    79.                 binum.push_back(1);
    80.                 binum.push_back(0);
    81.                 binum.push_back(0);
    82.                 binum.push_back(0);
    83.                 break;
    84.             case '9': cout << "1001";
    85.                 binum.push_back(1);
    86.                 binum.push_back(0);
    87.                 binum.push_back(0);
    88.                 binum.push_back(1);
    89.                 break;
    90.             case 'A': cout << "1010";
    91.                 binum.push_back(1);
    92.                 binum.push_back(0);
    93.                 binum.push_back(1);
    94.                 binum.push_back(0);
    95.                 break;
    96.             case 'B': cout << "1011";
    97.                 binum.push_back(1);
    98.                 binum.push_back(0);
    99.                 binum.push_back(1);
    100.                 binum.push_back(1);
    101.                 break;
    102.             case 'C': cout << "1100";
    103.                 binum.push_back(1);
    104.                 binum.push_back(1);
    105.                 binum.push_back(0);
    106.                 binum.push_back(0);
    107.                 break;
    108.             case 'D': cout << "1101";
    109.                 binum.push_back(1);
    110.                 binum.push_back(1);
    111.                 binum.push_back(0);
    112.                 binum.push_back(1);
    113.                 break;
    114.             case 'E': cout << "1110";
    115.                 binum.push_back(1);
    116.                 binum.push_back(1);
    117.                 binum.push_back(1);
    118.                 binum.push_back(0);
    119.                 break;
    120.             case 'F': cout << "1111";
    121.                 binum.push_back(1);
    122.                 binum.push_back(1);
    123.                 binum.push_back(1);
    124.                 binum.push_back(1);
    125.                 break;
    126.             case 'a': cout << "1010";
    127.                 binum.push_back(1);
    128.                 binum.push_back(0);
    129.                 binum.push_back(1);
    130.                 binum.push_back(0);
    131.                 break;
    132.             case 'b': cout << "1011";
    133.                 binum.push_back(1);
    134.                 binum.push_back(0);
    135.                 binum.push_back(1);
    136.                 binum.push_back(1);
    137.                 break;
    138.             case 'c': cout << "1100";
    139.                 binum.push_back(1);
    140.                 binum.push_back(1);
    141.                 binum.push_back(0);
    142.                 binum.push_back(0);
    143.                 break;
    144.             case 'd': cout << "1101";
    145.                 binum.push_back(1);
    146.                 binum.push_back(1);
    147.                 binum.push_back(0);
    148.                 binum.push_back(1);
    149.                 break;
    150.             case 'e': cout << "1110";
    151.                 binum.push_back(1);
    152.                 binum.push_back(1);
    153.                 binum.push_back(1);
    154.                 binum.push_back(0);
    155.                 break;
    156.             case 'f': cout << "1111";
    157.                 binum.push_back(1);
    158.                 binum.push_back(1);
    159.                 binum.push_back(1);
    160.                 binum.push_back(1);
    161.                 break;
    162.             default: cout << "\nInvalid hexadecimal digit '" << *i << "'"; //error here
    163.             }
    164.             i++;
    165.         }
    166.     }
    167. }
    168.  
    169.  
    170.  
    171. int main()
    172. {
    173.     // VARIABLE DECLARATIONS
    174.     Hex hex;
    175.     hex.HexToBin("A24B");
    176.         return 0;
    177. }