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PO
primarykey
Id
573732
data
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0
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0
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CreationDate
2009-02-21T20:53:51.797
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2009-02-21T20:53:51.797
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0
OwnerUserId
59844
ParentId
572962
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2
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0
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0
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text
Body
<p>Here is how I would load/save it:</p> <pre><code>#include <iostream> #include <fstream> #include <string> int width = 0; int height = 0; double **distances; void WriteDouble( std::ofstream &stream, double toWrite ) { char buffer[8]; memcpy( buffer, &toWrite, 8 ); stream.write( buffer, 8 ); } void WriteInt( std::ofstream &stream, int toWrite ) { char buffer[4]; memcpy( buffer, &toWrite, 4 ); stream.write( buffer, 4 ); } double ReadDouble( std::ifstream &stream ) { double d = 0; stream.read( (char *)&d, 8 ); return d; } int ReadInt( std::ifstream &stream ) { int i = 0; stream.read( (char *)&i, 4 ); return i; } void Save() { std::ofstream stream( "cities", std::ios::out | std::ios::binary ); if( !stream.good() ) { throw std::exception( "Error opening stream" ); } WriteInt( stream, width ); WriteInt( stream, height ); for( int x = 0; x < width; x++ ) { for( int y = 0; y < height; y++ ) { WriteDouble( stream, distances[x][y] ); } } stream.close(); } void Load() { std::ifstream stream( "cities", std::ios::in | std::ios::binary ); if( !stream.good() ) { throw std::exception( "Error opening stream" ); } width = ReadInt( stream ); height = ReadInt( stream ); distances = new double *[width]; for( int i = 0; i < width; i++ ) { distances[i] = new double[height]; } for( int x = 0; x < width; x++ ) { for( int y = 0; y < height; y++ ) { distances[x][y] = ReadDouble( stream ); } } stream.close(); } void RunSaveTest() { width = 15; height = 15; distances = new double *[width]; for( int i = 0; i < width; i++ ) { distances[i] = new double[height]; } for( int x = 0; x < width; x++ ) { for( int y = 0; y < height; y++ ) { distances[x][y] = (double)x / (double)( y + 1 ); std::cout << distances[x][y] << std::endl; } } Save(); } void RunLoadTest() { Load(); for( int x = 0; x < width; x++ ) { for( int y = 0; y < height; y++ ) { std::cout << distances[x][y] << std::endl; } } } int main() { RunSaveTest(); // RunLoadTest(); return 0; } </code></pre>
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1. This table or related slice is empty.
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1. POReading a Matrix txt file and storing as an array
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1. PTAnswer
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UserOwnerUserId
1. USxian
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