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  1. #include <iostream>
  2. #include <stdexcept>  // For std::overflow_error
  3.  
  4. // Function to multiply two integers and check for overflow
  5. int multiply(int a, int b) {
  6.     // We will check for overflow conditions
  7.     if (a > 0 && b > 0 && a > (INT32_MAX / b)) {
  8.         throw std::overflow_error("Overflow occurred while multiplying positive numbers");
  9.     }
  10.     if (a < 0 && b < 0 && a < (INT32_MAX / b)) {
  11.         throw std::overflow_error("Overflow occurred while multiplying two negative numbers");
  12.     }
  13.     if (a > 0 && b < 0 && b < (INT32_MIN / a)) {
  14.         throw std::overflow_error("Overflow occurred while multiplying positive by negative number");
  15.     }
  16.     if (a < 0 && b > 0 && a < (INT32_MIN / b)) {
  17.         throw std::overflow_error("Overflow occurred while multiplying negative by positive number");
  18.     }
  19.  
  20.     return a * b;
  21. }
  22.  
  23. int main() {
  24.     int x, y;
  25.     std::cout << "Enter two integers: ";
  26.     std::cin >> x >> y;
  27.  
  28.     try {
  29.         int result = multiply(x, y);
  30.         std::cout << "Result: " << result << std::endl;
  31.     } catch (const std::overflow_error& e) {
  32.         std::cerr << "Caught an overflow_error exception: " << e.what() << std::endl;
  33.     }
  34.  
  35.     return 0;
  36. }
  37.  
Success #stdin #stdout #stderr 0s 5284KB
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stdin
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50000 50000
stdout
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Enter two integers:
stderr
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Caught an overflow_error exception: Overflow occurred while multiplying positive numbers
https://ideone.com/mtLlNN
language:
C++ (gcc 8.3)
created:
8 days ago
visibility:
public

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