Question

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Why can't variables be declared in a switch statement?

I have a strange error in my code below:

char choice=Getchar();
switch(choice)
{
case 's':
    cout<<" display tree ";
    thetree->displaytree();
    break;

case 'i':
    cout<<"  enter value to insert "<<endl;
    cin>>value;
    thetree->insert(value);
    break;
case 'f' :
    cout<< "enter value to find ";
    cin>>value;
    int found=thetree->find(value);
    if(found!=-1)
        cout<<" found  =  "<<value<<endl;
        else
            cout<< " not found " <<value <<endl;
        break;
default:
    cout <<" invalid entry "<<endl;;
    }

Visual Studio 2010 compiler says that:

1>c:\users\daviti\documents\visual studio 2010\projects\2-3-4\2-3-4\2-3-4.cpp(317): error C2361: initialization of 'found' is skipped by 'default' label
1>          c:\users\daviti\documents\visual studio 2010\projects\2-3-4\2-3-4\2-3-4.cpp(308) : see declaration of 'found'

I think that I have correctly written break and default statements, so where is the error?

Answer 1

You need to either enclose your case 'f': with a scoped brace:

case 'f' :
{  
    cout<< "enter value to find ";
    cin>>value;
    int found=thetree->find(value);
    if(found!=-1)
        cout<<" found  =  "<<value<<endl;
    else
        cout<< " not found " <<value <<endl;
    break;
}

or place the declaration of found outside of the switch