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  1. #include <iostream>
  2. #include <vector>
  3. #include <stdexcept> // For handling division by zero
  4.  
  5. // Function to perform addition
  6. double addition(const std::vector<double>& numbers) {
  7.     double result = 0.0;
  8.     for (double num : numbers) {
  9.         result += num;
  10.     }
  11.     return result;
  12. }
  13.  
  14. // Function to perform subtraction
  15. double subtraction(const std::vector<double>& numbers) {
  16.     double result = numbers[0];
  17.     for (size_t i = 1; i < numbers.size(); ++i) {
  18.         result -= numbers[i];
  19.     }
  20.     return result;
  21. }
  22.  
  23. // Function to perform multiplication
  24. double multiplication(const std::vector<double>& numbers) {
  25.     double result = 1.0;
  26.     for (double num : numbers) {
  27.         result *= num;
  28.     }
  29.     return result;
  30. }
  31.  
  32. // Function to perform division
  33. double division(const std::vector<double>& numbers) {
  34.     double result = numbers[0];
  35.     for (size_t i = 1; i < numbers.size(); ++i) {
  36.         if (numbers[i] == 0) {
  37.             throw std::invalid_argument("Error: Division by zero!");
  38.         }
  39.         result /= numbers[i];
  40.     }
  41.     return result;
  42. }
  43.  
  44. int main() {
  45.     char choice;
  46.  
  47.     do {
  48.         // Display menu
  49.         std::cout << "Menu:\n";
  50.         std::cout << "1. Addition\n";
  51.         std::cout << "2. Subtraction\n";
  52.         std::cout << "3. Multiplication\n";
  53.         std::cout << "4. Division\n";
  54.         std::cout << "5. Quit\n";
  55.         std::cout << "Enter your choice: ";
  56.         std::cin >> choice;
  57.  
  58.         // Validate choice
  59.         if (choice < '1' || choice > '5') {
  60.             std::cerr << "Invalid choice. Please enter a number from 1 to 5." << std::endl;
  61.             continue;
  62.         }
  63.  
  64.         // Perform operation based on choice
  65.         if (choice == '5') {
  66.             std::cout << "Exiting program..." << std::endl;
  67.             break;
  68.         }
  69.  
  70.         int numNumbers;
  71.         std::cout << "How many numbers do you want to " << (choice == '4' ? "divide" : "use") << "? ";
  72.         std::cin >> numNumbers;
  73.  
  74.         // Input numbers
  75.         std::vector<double> numbers(numNumbers);
  76.         std::cout << "Enter " << numNumbers << " numbers: ";
  77.         for (int i = 0; i < numNumbers; ++i) {
  78.             std::cin >> numbers[i];
  79.         }
  80.  
  81.         // Perform selected operation
  82.         double result;
  83.         try {
  84.             switch (choice) {
  85.                 case '1':
  86.                     result = addition(numbers);
  87.                     break;
  88.                 case '2':
  89.                     result = subtraction(numbers);
  90.                     break;
  91.                 case '3':
  92.                     result = multiplication(numbers);
  93.                     break;
  94.                 case '4':
  95.                     result = division(numbers);
  96.                     break;
  97.                 default:
  98.                     result = 0.0; // This should never happen
  99.                     break;
  100.             }
  101.             // Display result
  102.             std::cout << "Result: " << result << std::endl;
  103.         } catch (const std::invalid_argument& e) {
  104.             std::cerr << e.what() << std::endl;
  105.         }
  106.  
  107.     } while (true);
  108.  
  109.     return 0;
  110. }
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#include <iostream>
#include <vector>
#include <stdexcept> // For handling division by zero

// Function to perform addition
double addition(const std::vector<double>& numbers) {
    double result = 0.0;
    for (double num : numbers) {
        result += num;
    }
    return result;
}

// Function to perform subtraction
double subtraction(const std::vector<double>& numbers) {
    double result = numbers[0];
    for (size_t i = 1; i < numbers.size(); ++i) {
        result -= numbers[i];
    }
    return result;
}

// Function to perform multiplication
double multiplication(const std::vector<double>& numbers) {
    double result = 1.0;
    for (double num : numbers) {
        result *= num;
    }
    return result;
}

// Function to perform division
double division(const std::vector<double>& numbers) {
    double result = numbers[0];
    for (size_t i = 1; i < numbers.size(); ++i) {
        if (numbers[i] == 0) {
            throw std::invalid_argument("Error: Division by zero!");
        }
        result /= numbers[i];
    }
    return result;
}

int main() {
    char choice;
    
    do {
        // Display menu
        std::cout << "Menu:\n";
        std::cout << "1. Addition\n";
        std::cout << "2. Subtraction\n";
        std::cout << "3. Multiplication\n";
        std::cout << "4. Division\n";
        std::cout << "5. Quit\n";
        std::cout << "Enter your choice: ";
        std::cin >> choice;
        
        // Validate choice
        if (choice < '1' || choice > '5') {
            std::cerr << "Invalid choice. Please enter a number from 1 to 5." << std::endl;
            continue;
        }
        
        // Perform operation based on choice
        if (choice == '5') {
            std::cout << "Exiting program..." << std::endl;
            break;
        }
        
        int numNumbers;
        std::cout << "How many numbers do you want to " << (choice == '4' ? "divide" : "use") << "? ";
        std::cin >> numNumbers;
        
        // Input numbers
        std::vector<double> numbers(numNumbers);
        std::cout << "Enter " << numNumbers << " numbers: ";
        for (int i = 0; i < numNumbers; ++i) {
            std::cin >> numbers[i];
        }
        
        // Perform selected operation
        double result;
        try {
            switch (choice) {
                case '1':
                    result = addition(numbers);
                    break;
                case '2':
                    result = subtraction(numbers);
                    break;
                case '3':
                    result = multiplication(numbers);
                    break;
                case '4':
                    result = division(numbers);
                    break;
                default:
                    result = 0.0; // This should never happen
                    break;
            }
            // Display result
            std::cout << "Result: " << result << std::endl;
        } catch (const std::invalid_argument& e) {
            std::cerr << e.what() << std::endl;
        }
        
    } while (true);
    
    return 0;
}
https://ideone.com/HFrqCH
language:
PHP (php 7.3.5)
created:
17 days ago
visibility:
public

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