C++学习日记11——异常处理

学习视频链接

C++异常处理机制_哔哩哔哩_bilibilihttps://www.bilibili.com/video/BV1jX4y1V7o4?spm_id_from=333.337.search-card.all.click

目录

一、第一个异常处理程序

二、获取返回值

三、处理不同的返回值类型

---

一、第一个异常处理程序

#include 
#include 
using namespace std;

float Div(int a, int b) 
{
	if (b == 0)
	{
		throw b;
	}
	return a / b;
}

int main(void) 
{
	int a = 10;
	int b = 0;
	float result = 0.0;
	try 
	{
		result = Div(a, b);
	}
	catch (int)
	{
		cout << "Div Error, b == 0" << endl;
	}
	cout << "result = " << result << endl;
	return 0;
}

二、获取返回值

#include 
#include 
using namespace std;

float Div(int a, int b) 
{
	if (b == 0)
	{
		int x = 2;
		throw x;
	}
	return a / b;
}

int main(void) 
{
	int a = 10;
	int b = 0;
	float result = 0.0;
	try 
	{
		result = Div(a, b);
	}
	catch (int x)
	{
		cout << "返回值：" << x << endl;
	}
	cout << "result = " << result << endl;
	return 0;
}

三、处理不同的返回值类型

#include 
#include 
using namespace std;

float Div(int a, int b) 
{
	if (b == 0)
	{
		short x = 2;
		throw x;
	}
	return a / b;
}

int main(void) 
{
	int a = 10;
	int b = 0;
	float result = 0.0;
	try 
	{
		result = Div(a, b);
	}
	catch (int x)
	{
		cout << "返回值：" << x << endl;
	}
	catch (short)
	{
		cout << "处理返回值为short类型的异常" << endl;
	}
	cout << "result = " << result << endl;
	return 0;
}