C++: convert int to string

Question

I have an int value out of a slider and want to write that value into a label with this expression

ui->label_1->setText(std::to_string(ui->verticalSlider->value()));

but i get this error:

ambiguous call to overloaded function

I think i have to typecast the value, but don't know how.

ui->label_1->setText(std::to_string(static_cast<int>(ui->verticalSlider->value())));

also didn't work.

What is the signature of `value()`? Can you post the full error message instead of just that snippet? — Cory Kramer, Jun 18 '15 at 13:39
are you using Visual C++? in that case check http://stackoverflow.com/questions/10664699 — fferri, Jun 18 '15 at 13:39
possible duplicate of [Ambiguous call to overloaded function - std::to\_string](http://stackoverflow.com/questions/14617950/ambiguous-call-to-overloaded-function-stdto-string) — fferri, Jun 18 '15 at 13:39
Please [edit](http://stackoverflow.com/posts/30916955/edit) your question with a [SSCCE](http://sscce.org). — NathanOliver, Jun 18 '15 at 13:41
looks like Qt, try using QString::number, maybe it got better overloads (http://doc.qt.io/qt-5/qstring.html#number) — Hcorg, Jun 18 '15 at 13:43
Yes i have Qt and yes QString::number worked, but what is the problem with the overloads? ui->label_1->setText(std::to_string(static_cast(ui->verticalSlider->value()))); doesn't work — Creatronik, Jun 18 '15 at 13:48

Protomen · Answer 1 · 2015-06-19T22:46:26.880

0

ui->label_1->setText needs QString and not std::to_string.

Try this:

ui->label_1->setText(QString::number(ui->verticalSlider->value()));

edited Jun 19 '15 at 22:46

answered Jun 18 '15 at 14:01

Protomen

@Creatronik with `QString::number` causes error *ambiguous call to overloaded function*? – Protomen Jun 18 '15 at 14:23
@Creatronik qt5.4 with c++11? – Protomen Jun 18 '15 at 15:19
No, std::to_string. QString::number works fine I have c++ 10. – Creatronik Jun 19 '15 at 08:40
@Creatronik But why would you want to use `std::to_string(static_cast(...))`? – Protomen Jun 19 '15 at 22:46
Because the compiler told me that the expression is ambiguous and that i would have to cast the datatype, like referred in a linked post in the comments of my initial question. – Creatronik Jun 22 '15 at 12:32

1 Answers1