在 Qt Creator 中调试与运行。 不同的数值

Question

I work on C++ Qt project in QtCreator. There is some manipulation with data (for ex. std::double type). When I start debug without any breakpoint then my application shows correct data (-8.7357). But when I run already compiled program I've got (-8). What could be reason for this situation?

Below is a piece of my json file:

{
...
"sources": [
    [-8.30000, -1.43300, 0],
    [-8.73575, -1.76287, -0.24404],
    [-8.68767, -1.72513, 0.35267],
    [-8.24991, -1.39526, 0.59671],
    [-7.86225, -1.10313, 0.24404],
    [-7.91233, -1.14087, -0.35267],
    [-8.35009, -1.47074, -0.59671]
]
...
}

Parsing that file:

Json::Value root;
std::ifstream jsonFile(pathToJsonFile);
jsonFile >> root;
...
Json::Value srsc = root["sources"];
for (Json::Value::ArrayIndex i = 0; i != srsc.size(); i++)
{
   Json::Value src = Json::arrayValue;
   src = srsc[i];

   Antenna::centerPoint cp;
   cp.x = src.get(Json::ArrayIndex(0), Json::Value()).asDouble();
   cp.y = src.get(Json::ArrayIndex(1), Json::Value()).asDouble();
   cp.z = src.get(Json::ArrayIndex(2), Json::Value()).asDouble();
   an.sources[i] = cp;
}

Setting data to the model then show it on screen:

for(unsigned int row = 0; row < an.sources.size(); row++)
{
    model->setData(model->index(row, 0), an.sources[row].x);
    model->setData(model->index(row, 1), an.sources[row].y);
    model->setData(model->index(row, 2), an.sources[row].z);
}
...
ui->sourcesTableView->setModel(model);

I'm using:

I am under Linux astra 4.15.3-2-generic OS
GCC compiler - gcc (Debian 6.3.0-18+deb9u1) 6.3.0 20170516.
cmake version 3.7.2
gdb debuger - GNU gdb (Debian 7.12-6) 7.12.0.20161007-git

Answer 1

Here is I duplicate the answer from the comments.
My json-file uses '. ' decimal separator. Qt uses the information from QSystemLocale ie the locale information from the Operating System. Probably GDB debugger uses his own setting. That's why I've got correct data while debugging. I changed line in file /usr/share/i18n/locales/ru_RU

decimal_point "<U002C>"

to

decimal_point "<U002E>"

Then I reconfigured locales:

dpkg-reconfigure locales

and finally restart Qt Creator and it works fine.