编辑“︁C++ throw 语句”︁（章节）

== 基本用法示例 ==

=== 抛出内置类型异常 ===
最简单的throw语句可以抛出基本类型：
<syntaxhighlight lang="cpp">
#include <iostream>

double divide(double a, double b) {
    if (b == 0.0) {
        throw "Division by zero!";  // 抛出const char*类型异常
    }
    return a / b;
}

int main() {
    try {
        std::cout << divide(10, 0) << std::endl;
    } catch (const char* msg) {
        std::cerr << "Error: " << msg << std::endl;
    }
    return 0;
}
</syntaxhighlight>
'''输出：'''
<pre>
Error: Division by zero!
</pre>

=== 抛出标准异常 ===
更推荐的做法是使用标准库中的异常类：
<syntaxhighlight lang="cpp">
#include <iostream>
#include <stdexcept>

double divide(double a, double b) {
    if (b == 0.0) {
        throw std::runtime_error("Division by zero!");
    }
    return a / b;
}

int main() {
    try {
        std::cout << divide(10, 0) << std::endl;
    } catch (const std::exception& e) {
        std::cerr << "Standard exception: " << e.what() << std::endl;
    }
    return 0;
}
</syntaxhighlight>
'''输出：'''
<pre>
Standard exception: Division by zero!
</pre>