Drawing a graph using executing time of a function in c++

Question

I'm calling some functions several times(5000-10000) and measuring the time it takes to finish the execution of function each time.

For example : Binary search with 10 ints , 11 ints, 1000 ints... Now I want to draw the graph of how much it takes to finish the search , every step.

I have the amount of integers as X and the time as Y. But I don't know how to connect the points to making a graph , Is there any function or library in visual studio 2015 that help me to draw a graph ? like "graphics.h" in borland

Edit : Using windows 10 and visual studio 2015

Standard C++ doesn't provide any graphics capabilities, so to get a meaningful answer you'll need to tell us what compiler and OS this needs to be written for. — Jerry Coffin, Nov 12 '17 at 16:13
Why not write the results to a CSV file and then use Excel to generate the graph? — Ed Heal, Nov 12 '17 at 16:20
Also, your question lacks a lot of motivation (and you should never comment your own question, but just edit it). Do you need a quick&dirty solution for internal benchmarking purposes, or is it more serious. Do you care about [heisenbugs](https://en.wikipedia.org/wiki/Heisenbug) or deficiencies ? Probably adding what you want will alter your benchmarking.... — Basile Starynkevitch, Nov 22 '17 at 11:53

Basile Starynkevitch · Accepted Answer · 2017-11-22T11:42:23.373

Standard C++11 or C++14 does not have any graphics library.

But you should consider using Qt, a free software cross-platform GUI library for C++. I guess that you'll be happy in using Qt graphics view framework. You could also consider some other, perhaps OS specific, widget toolkit. Or just output a 2D graphics using libcairo.

Another possibility might be to output some textual file (for GNUplot, in JSON, in SVG, for some spreadsheet in CSV, etc...) and use some external program to display that graph (in textual format). You could even use some inter-process communication (e.g. some FIFO or pipeline, with _popen or better) between them.

^{BTW Windows is AFAIK not a real-time OS, but you don't really need real-time as you commented, you just need some interactivity. IMHO pipelining to GNUplot is very easy (at least on Linux, and probably on Windows too....).}

Thanks I did it another way but your answer (QT) is much better , Thank you! — M4HdYaR, Nov 22 '17 at 11:31
Actually, I believe that piping into GNUplot should be enough for your purpose, and that is really simple. — Basile Starynkevitch, Nov 22 '17 at 11:32

Drawing a graph using executing time of a function in c++

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