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C++ > For Loops and While Loops Code Examples

Exception in for_each in C++ programming

Exception in for_each in C++ programming

If the function throws an exception then for_each will also throw the same exception and will break/terminate the loop. Below is an example for the exception case.

#include 
#include 
using namespace std;

void fun1(int x) 
{
    cout << x << " ";
    if (x % 2 == 0)
    {
        throw 100;
    }
}

struct Class1 // object type function
{           
    void operator() (int x) 
    {
        cout << x << " ";
        if (x % 2 == 0)
        {
            throw 100;
        }            
    }
} myobject;

int main() 
{
    vector v1;
    v1.push_back(11);
    v1.push_back(23);
    v1.push_back(4);
    v1.push_back(13);

    try 
    {
        for_each(v1.begin(), v1.end(), fun1);        
    } 
    catch (int i) 
    {
        cout << endl << "Got exception...Value thrown is " << i << endl;
    }
    try 
    {
        for_each (v1.begin(), v1.end(), myobject);
    } 
    catch (int i) 
    {
        cout << endl << "Got exception...Value thrown is " << i << endl;
    }    
    return 0;
}

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