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POC/C++ for Python programmer
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2012-03-22T12:28:12.867
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2018-08-25T06:48:37.700
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I have to switch from Python to C/C++. Do you know a quick "reference tutorial" or something like that to have a reference to how to start? For example something like the Numpy and Scipy tutorials. I have read a lot of "documentation", for example <ul> <li>C++ for dummies</li> <li>the K&R C Programming Language</li> <li>a lot of blog and online documentation such as: http://eli.thegreenplace.net/2010/01/11/pointers-to-arrays-in-c/, </li> <li>http://newdata.box.sk/bx/c/</li> <li>tons of Q&A here on StackOverflow</li> <li>...</li> </ul> but it's still not clear to me even how to do start porting to C/C++ something like: <pre><code>#!/usr/bin/env python import time import numpy as np import tables as tb """Retrieve 3D positions form 1000 files and store them in one single HDF5 file. """ t = time.time() # Empty array sample = np.array([]) sample.shape = (0,3) # Loop over the files for i in range(0, 1000): filename = "mill2sort-"+str(i)+"-extracted.h5" print "Doing ", filename # Open data file h5f = tb.openFile(filename, 'r') # Stack new data under previous data sample = np.vstack((sample, h5f.root.data.read())) h5f.close() # Create the new file h5 = tb.openFile("mill2sort-extracted-all", 'w') # Save the array h5.createArray(h5.root, 'data', sample, title='mill_2_sub_sample_all') h5.flush() h5.close() print "Done in ", time.time()-t, " seconds." </code></pre> in C or C++. In this example I was not even able to understand how to pass a 3D array to a function that find it's dimensions, something like <pre><code>int getArrayDimensions(int* array, int *dimensions){ *dimensions = sizeof(*array)/sizeof(array[0]); return 0; } </code></pre> With array being <pre><code>int array[3][3][3] = ... </code></pre> Thank you for any suggestion!:)
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<c++><python><c><numerical>
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C/C++ for Python programmer
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