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  1. #include <iostream>
  2. #include <cstring>
  3.  
  4. using namespace std;
  5.  
  6. class String
  7. {
  8.     char* a;
  9.     int size;
  10. public:
  11.  
  12.     String() 
  13.     {
  14.         this->size = 80;
  15.         this->a = new char[size+1];
  16.     }
  17.     String(const char* ptr):String()
  18.     {
  19.  
  20.         this->setString(ptr);
  21.  
  22.     }
  23.     ~String() {
  24.         delete[] this->a;
  25.     }
  26.  
  27.     void setString(const char* ptr) {
  28.         if (ptr == nullptr)
  29.         {
  30.             return;
  31.         }
  32.         this->size = strlen(ptr);
  33.         delete[] this->a;
  34.         this->a = new char[size + 1];
  35.         for (size_t i = 0; i < size + 1; i++)
  36.         {
  37.             this->a[i] = ptr[i];
  38.         }
  39.     }
  40.  
  41.  
  42.     void show() {
  43.         for (size_t i = 0; i < size; i++)
  44.         {
  45.             cout << this->a[i];
  46.         }
  47.         cout << endl<<size<<endl;
  48.     }
  49.  
  50.     char operator[](int ind) 
  51.     {
  52.         return a[ind];
  53.     };
  54.  
  55.     int operator()(const char* tmp) {
  56.         for (size_t i = 0; i < size; i++)
  57.         {
  58.             if (a[i] == tmp[0])
  59.             {
  60.  
  61.                 return i;
  62.             }
  63.         }
  64.         return -1;
  65.     };
  66.     operator int() {
  67.         return size;
  68.     }
  69.     void operator++(int) {
  70.  
  71.         size++;
  72.         a = new char[size];
  73.  
  74.     }
  75. };
  76.  
  77.  
  78. int main()
  79. {
  80.     String a;
  81.  
  82.  
  83.     a.setString("words");
  84.     cout<<a("s")<<endl;
  85.     cout<<a[2]<<endl;
  86.  
  87.     a.show();
  88.     a++;
  89.     a.show();
  90.     cout << (int)a << endl;
  91.  
  92.     return 0;
  93. }
  94.  
Success #stdin #stdout 0s 5496KB
comments (?)
stdin 
Standard input is empty
stdout 
4
r
words
5

6
6
https://ideone.com/uRuFkm
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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