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  1. #include <iostream>
  2. #include <string>
  3.  
  4. bool hasChar(const char* s, char c)
  5. {
  6.     if (*s == '\0') {
  7.         return false;
  8.     }
  9.     if (*s == c) {
  10.         return true;
  11.     }
  12.     return hasChar(s + 1, c);
  13. }
  14.  
  15. bool equalsChar(const char* strA, const char* strB, char ch)
  16. {
  17.     if (*strA == '\0') {
  18.         return !hasChar(strB, ch);
  19.     } else if (*strB == '\0') {
  20.         return !hasChar(strA, ch);
  21.     }
  22.     if (*strA != *strB && (*strA == ch || *strB == ch)) {
  23.         return false;   
  24.     }
  25.     return equalsChar(strA + 1, strB + 1, ch);
  26. }
  27.  
  28. bool equalsChar(const std::string& strA, const std::string& strB, char ch){
  29.    return equalsChar(strA.c_str(), strB.c_str(), ch);
  30. }
  31.  
  32. void Test(const std::string& s1, const std::string& s2, char c, bool expected)
  33. {
  34.     std::cout << s1 << (expected ? " == " : " != ") << s2
  35.               << (expected == equalsChar(s1, s2, c) ? " OK" : " KO") << std::endl;
  36. }
  37.  
  38. int main()
  39. {
  40.     Test("X", "X", 'X', true);
  41.     Test("aaaXaaaX", "abcXcbaX", 'X', true);
  42.     Test("XaXbXcX", "XtXoXpXdef", 'X', true);
  43.     Test("XaXbXcX", "XtXoXpXdXf", 'X', false);
  44.     Test("XXXX", "XX", 'X', false);
  45.     Test("aXaXbXcX", "XtXoXpX", 'X', false);
  46. }
Success #stdin #stdout 0s 4384KB
comments (?)
stdin
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Standard input is empty
stdout
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X == X OK
aaaXaaaX == abcXcbaX OK
XaXbXcX == XtXoXpXdef OK
XaXbXcX != XtXoXpXdXf OK
XXXX != XX OK
aXaXbXcX != XtXoXpX OK
https://ideone.com/nHd2LW
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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