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  1. #include <iostream>
  2. #include <cstdlib>
  3. #include <cctype>
  4. #include <iomanip>
  5. #include <cstring>
  6.  
  7. const int MAX = 100;
  8.  
  9. using namespace std;
  10.  
  11. int getInt(char);
  12. bool isValidChar(char);
  13.  
  14. int main()
  15. {
  16.     int num;
  17.     int j = 0;
  18.     char name, conti;
  19.     char alpha[MAX];
  20.  
  21.     do {
  22.         cout << "Enter a phone symbols: " << endl;
  23.         cin.getline(alpha, MAX, ' ');
  24.         while (alpha[j] != '\0')
  25.         {
  26.             name = alpha[j];
  27.  
  28.             if (isValidChar(name) == true)
  29.             {
  30.                 num = getInt(name);
  31.  
  32.                 if (num == -1)
  33.                 {
  34.                     cout << "-";
  35.                 }
  36.                 else
  37.                 {
  38.                     cout << num;
  39.                 }
  40.             }
  41.             else
  42.             {
  43.                 cout << " - Invalid Char " << name << " found - rejected";
  44.             }
  45.  
  46.             j++;
  47.         } // end while
  48.         j = 0;
  49.         cout << endl;
  50.  
  51.         cout << "\nContinue (Y/y): ";
  52.         cin >> conti;
  53.         cin.ignore();
  54.  
  55.     } while (conti == 'y');
  56. }
  57.  
  58. int getInt(char input)
  59. {
  60.     int result;
  61.     char value;
  62.     value = tolower(input);
  63.     if ((value >= 'a' && value <= 'c'))
  64.     {
  65.         result = 2;
  66.     }
  67.     else if ((value >= 'd' && value <= 'f'))
  68.     {
  69.         result = 3;
  70.     }
  71.     else if ((value >= 'g' && value <= 'i'))
  72.     {
  73.         result = 4;
  74.     }
  75.     else if ((value >= 'j' && value <= 'l'))
  76.     {
  77.         result = 5;
  78.     }
  79.     else if ((value >= 'm' && value <= 'o'))
  80.     {
  81.         result = 6;
  82.     }
  83.     else if ((value >= 'p' && value <= 's'))
  84.     {
  85.         result = 7;
  86.     }
  87.     else if ((value >= 't' && value <= 'v'))
  88.     {
  89.         result = 8;
  90.     }
  91.     else if ((value >= 'w' && value <= 'z'))
  92.     {
  93.         result = 9;
  94.     }
  95.     else
  96.     {
  97.         result = -1;
  98.     }
  99.     return result;
  100. }
  101.  
  102. bool isValidChar(char value)
  103. {
  104.     if (isalpha(value) || value == ' ')
  105.     {
  106.         return true;
  107.     }
  108.     else
  109.     {
  110.         return false;
  111.     }
  112. }
Success #stdin #stdout 0s 3300KB
comments (?)
stdin
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abc y xyz n
stdout
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Enter a phone symbols: 
222

Continue (Y/y): Enter a phone symbols: 
999

Continue (Y/y):
https://ideone.com/2ZaMIb
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
secret

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