try/throw/catch

try 保护代码，throw抛出值，catch接受并处理异常

一般格式

try

{

//程序中抛出异常

    throw value;

}

catch(valuetype v)

{

//异常处理程序
}

测试示例

#include <iostream>

using namespace std;
int main(int argc,char *argv[])

{
cout<< "In main"<<endl;

    //Define a try block, which is code block enclosed  by a pair of curly braces {}

    try{

        cout<< "In the try block being ready to throw an exception"<<endl;

        //Since code being protected in the try block,so after the exception is thrown, the program  control flow will go to the next catch block.

        throw 1;

        cout<<"In the try block, because  throws an exception, so  the code here is not going to be executed"<<endl;
}

    //Here must correspond to the definition of at least one catch block, the same it is also enclosed in curly braces

    catch(int & value)

    {

        cout<< "In the catch block,  handling the exception errors. the  exception value is  "<<value<<endl;

        cout<< "Backing into main,execution resumes here."<<endl;
}
cout<<"Testing finished!"<<endl;

    return 0;

}

try/throw/catch,码迷,mamicode.com