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width() non-functional (for me) #28

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dougp2 opened this issue Jan 12, 2019 · 3 comments
Open

width() non-functional (for me) #28

dougp2 opened this issue Jan 12, 2019 · 3 comments

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@dougp2
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dougp2 commented Jan 12, 2019

This code:
[code]
// width.cpp -- using the width method
// C++ primer 17.4, page 1080

#include <ArduinoSTL.h>
//#include <PrintStream.h>

void setup() {

Serial.begin(115200);

using std::cout;
int w = cout.width(30);
cout << "default field width = " << w << ":\n";

cout.width(5);
cout << "N" <<':';
cout.width(8);
cout << "N * N" << ":\n";

for (long i = 1; i <= 100; i *= 10)
{
    cout.width(5);
    cout << i <<':';
    cout.width(8);
    cout << i * i << ":\n";
}
// std::cin.get();

}[/code]

void loop() {}

is supposed to print right justified. It doesn't, everything on a line is jammed together.

Am I doing something wrong?

@kirkins
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kirkins commented Jan 19, 2019

I'm having a similar issue with accumulate:

'accumulate' is not a member of 'std'

Running as:

float average = std::accumulate(avgTemp.begin(), avgTemp.end(), 0.0)/avgTemp.size();

@mike-matera
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Owner

This seems to be a limitation of the underlying uClibc++ library. It looks like some of the functionality is implemented but it clearly doesn't work.

@Ebola-Chan-bot
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This is most likely because the baud rate of the serial port you set is too high. It had no problem setting the 9600 baud rate, while setting it to a value as high as yours it will become garbled.

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4 participants