NUll character output for combobox index

[mdskpr778]

Whenever I run this bit of code it prints blank characters:

void Photo::apertureChanged()
{
 
        QString x;
        x = aperture.itemText(0);
        QByteArray i  = x.toLatin1();
        const char *c_str2 = i.data();
        printf(c_str2);
 
}

void Photo::apertureChanged()
{

        QString x;
        x = aperture.itemText(0);
        QByteArray i  = x.toLatin1();
        const char *c_str2 = i.data();
        printf(c_str2);

}

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when really its supposed to print the aperture number of combobox index 0.
it compiles fine.
Thanks in Advance