bool load( const std::string& fileName, std::vector< std::string > & out ) { std::ifstream fin; bool result = false; fin.open( fileName.c_str() ); if ( fin.is_open() ) { char line[128]; while ( fin.good() ) { fin.getline( line, sizeof ( line ) ); out.push_back ( line ); } fin.close(); result = true; } return result;}Can you return an array?
Same principle as 1D - either pass the output variable as parameter or use some STL container:
Quote:Original post by mcgrane66
But can anyone now tell me, can i return a 2d array?
2D arrays are generally just manipulated as 1D array, using explicit addressing. i.e. you don't do foo[j] but foo[i*row_size+j]. The alternative is to use nested containers (in essence, creating an array of arrays), which is a very different beast from a "2D array", since 2D arrays are a single, contiguous block of memory. The 2D addressing syntax is just ... syntactic sugar.
If you really want multidimensional arrays you can pass around, look at boost::multi_array.
I wouldn't recommend returning an STL string from a function, at least not if it's very large. Speed difference between passing in the string as a reference and returning one is quite signifficant...
...and if i may be picky, if you can find the total size for the file, you should .resize() your vector and use the ifstream::read() function to fill it.
I just wanted to point this out before you get into a habit. I did, and recently ran my head into a wall when my .obj loader tried to load a high-poly object, and the load time exceeded...well several minutes...on one object...[grin]
...and if i may be picky, if you can find the total size for the file, you should .resize() your vector and use the ifstream::read() function to fill it.
I just wanted to point this out before you get into a habit. I did, and recently ran my head into a wall when my .obj loader tried to load a high-poly object, and the load time exceeded...well several minutes...on one object...[grin]
Quote:Original post by Android_s
I wouldn't recommend returning an STL string from a function, at least not if it's very large. Speed difference between passing in the string as a reference and returning one is quite signifficant...
RVO.
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