How to handle multiple exceptions in C++?

C++ Ways to handle multiple exceptions include using try-catch blocks, which allow exceptions to be caught and handled for specific exception types; or using try blocks and a catch (...) block to catch all exception types. In the actual case, the try block attempts the division operation, captures the invalid_argument and exception exception types through two catch blocks, and outputs the corresponding error information.

How to handle multiple exceptions in C++

C++ provides a variety of methods for handling multiple exceptions, including:

try-catch block

try {
  // 代码可能引发异常
} catch (const std::exception& e) {
  // 处理 std::exception 异常
} catch (const std::runtime_error& e) {
  // 处理 std::runtime_error 异常
}

catch(...)

try {
  // 代码可能引发异常
} catch (...) {
  // 处理所有异常
}

typeid

try {
  // 代码可能引发异常
} catch (const std::exception& e) {
  if (typeid(e) == typeid(std::runtime_error)) {
    // 处理 std::runtime_error 异常
  }
}

Actual combat Case

The following example demonstrates the use of a try-catch block to handle multiple exceptions:

#include <iostream>
#include <exception>

using namespace std;

int main() {
  try {
    int x = 10;
    int y = 0;

    cout << "x / y = " << x / y << endl;
  } catch (const invalid_argument& e) {
    cout << "Division by zero error: " << e.what() << endl;
  } catch (const exception& e) {
    cout << "Error: " << e.what() << endl;
  }

  return 0;
}

In this example:

• try block Attempt to execute code that may throw an exception.
• catch (const invalid_argument& e) Block handles invalid_argument exceptions.
• catch (const exception& e) block handles all other exceptions.

Running this program will output the following results:

Division by zero error: invalid argument

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