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
– Cory Kramer, Commented Jun 18, 2015 at 13:39
are you using Visual C++? in that case check stackoverflow.com/questions/10664699 — fferri
– fferri, Commented Jun 18, 2015 at 13:39
possible duplicate of Ambiguous call to overloaded function - std::to_string — fferri
– fferri, Commented Jun 18, 2015 at 13:39
looks like Qt, try using QString::number, maybe it got better overloads (doc.qt.io/qt-5/qstring.html#number) — Hcorg
– Hcorg, Commented Jun 18, 2015 at 13:43

Korvo · Accepted Answer · 2015-06-19 22:46:26Z

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, 2015 at 22:46

answered Jun 18, 2015 at 14:01

Korvo

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5 Comments

Korvo Over a year ago

@Creatronik with QString::number causes error ambiguous call to overloaded function?

Korvo Over a year ago

@Creatronik qt5.4 with c++11?

Kreatronik Over a year ago

No, std::to_string. QString::number works fine I have c++ 10.

Korvo Over a year ago

@Creatronik But why would you want to use std::to_string(static_cast<int>(...))?

Kreatronik Over a year ago

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.

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