C ++ Concept-Exception Handling

Posted Date: 12 Jun 2008 Resource Type: Articles/Knowledge Sharing Category: Computer & Technology

Posted By: Girish Patil Member Level: Diamond
Rating:

Points: 3

EXCEPTION HANDLING

The two most common types of bugs are logic errors and syntactic errors. The logic errors occur due to poor understanding of the problem and solution procedure. The syntactic errors arise due to poor understanding of the language itself. ANSI C++ provides built in language features, to detect and handle exceptions which are basically run time errors. Exception handling was not part of the original C++. It is a new feature added to ANSI C++.

Try block throwing an exception:
#include
void main()
{
int a,b;
cout<< “Enter values of a and b”;
cin>>a>>b;
int x = a-b;
try
{
if(x != 0)
{
cout<<”Result(a/x0 = “ << a/x <<”\n”;
}
else //there is an exception
{
throw(x); //throws int object
}
}
catch(int i) //catches the exception
{
cout<< “exception caught : x = “<< x <<”\n”;
}
cout << “End “;
}

// example with try, multiple catch
#include
void test(int x)
{
try
{
if( x == 1) throw x; //int
else
if(x == 0 ) throw 'x'; //char
else
if(x == -1) throw 1.0; //double
cout<<"End of try block";
}
catch(char c) //catch 1
{
cout<< "Caught a character";
}
catch(int m) //catch 2
{
cout<< "Caught an integer";
}
catch(double d) //catch 3
{
cout<< "Caught a character";
}
}

void main()
{
cout<<"Testing of multiple catches ";
cout<<"X == 1";
test(1);
cout<<"X==0";
test(0);
cout<<"X==-1";
test(-1);
}

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