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  1. #include <iostream>
  2. #include <string>
  3.  
  4. using namespace std;
  5.  
  6. float calculateCost(int duration, bool sameOperator) {
  7.     const int first30Rate = 3; // 3 den per minute for first 30 minutes
  8.     const int after30Rate = 2; // 2 den per minute after 30 minutes
  9.     float cost = 0;
  10.  
  11.     if (duration <= 30) {
  12.         cost = duration * first30Rate;
  13.     } else {
  14.         cost = (30 * first30Rate) + ((duration - 30) * after30Rate);
  15.     }
  16.  
  17.     // Apply 30% discount if both numbers are from the same operator
  18.     if (sameOperator) {
  19.         cost *= 0.7;
  20.     }
  21.  
  22.     return cost;
  23. }
  24.  
  25. bool sameOperator(const string &num1, const string &num2) {
  26.     // Assume numbers are from the same operator if first 3 digits match
  27.     return num1.substr(0, 3) == num2.substr(0, 3);
  28. }
  29.  
  30. int main() {
  31.     string phoneNumber1, phoneNumber2;
  32.     int duration;
  33.  
  34.     cout << "Enter the first phone number: ";
  35.     cin >> phoneNumber1;
  36.     cout << "Enter the second phone number: ";
  37.     cin >> phoneNumber2;
  38.     cout << "Enter the duration of the call (in minutes): ";
  39.     cin >> duration;
  40.  
  41.     // Check if numbers are valid (9 digits and start with 0)
  42.     if (phoneNumber1.length() != 9 || phoneNumber1[0] != '0' ||
  43.         phoneNumber2.length() != 9 || phoneNumber2[0] != '0') {
  44.         cout << "Invalid phone number format." << endl;
  45.         return 1;
  46.     }
  47.  
  48.     bool isSameOperator = sameOperator(phoneNumber1, phoneNumber2);
  49.     float cost = calculateCost(duration, isSameOperator);
  50.  
  51.     cout << "The cost of the call is: " << cost << " den" << endl;
  52.  
  53.     return 0;
  54. }
  55.  
Success #stdin #stdout 0.01s 5296KB
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Enter the first phone number: Enter the second phone number: Enter the duration of the call (in minutes): The cost of the call is: 21 den
https://ideone.com/78sTuF
language:
C++14 (gcc 8.3)
created:
5 days ago
visibility:
public

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