TinyXML value changer

#include <iostream>
#include "tinyxml.h"

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main() {
    const char * xmlFileName = "test.xml";
    TiXmlDocument _xmlDoc;
    const char *_currentVersion;
    const char *new_v = "012345";

    _xmlDoc.LoadFile(xmlFileName);

    TiXmlNode *root = _xmlDoc.FirstChild("GUPInput");
        if (!root)
            {
            printf("It's not a valid GUP input xml.");
            return -1;
            }


    TiXmlNode *versionNode = root->FirstChildElement("Version");
    if (versionNode)
    {
        TiXmlNode *n = versionNode->FirstChild();
        if (n)
        {
            const char *val = n->Value();
            if (val)
            {
                _currentVersion = val;
                printf("Actual version is %s\n", val);
                n->SetValue(new_v);
                printf("Actual version should be %s\n", new_v);
            }

        }
    }
    _xmlDoc.SaveFile();
    return 0;
}