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POC++ edit a binary file with another
 

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    <p>Solved! thanks all of you very much. My day has been made!(well morning, its 4am)</p> <p>I'm trying to write a program in C++ that opens a .dat file in binary and replaces the first 1840 hex characters with that of another .dat file, while leaving the remaining hex values of the first .dat file the same. I have spent about 12 hours on this today and have had little success. I am a beginner programmer, I have taken one semester worth of c++ courses and we did not get to streams. </p> <p>(it opens a file and everything, but deletes every thing after the new values have been added)</p> <pre><code>#include &lt;iostream&gt; #include &lt;iomanip&gt; #include &lt;fstream&gt; #include &lt;string&gt; #include &lt;cmath&gt; #include &lt;cstring&gt; using namespace std; int main (){ string filename; long size; char* memblock; cout &lt;&lt; " Enter a file to be modded by Mod.dat "; cin &gt;&gt; filename; ofstream infile ( filename ,std::ofstream::binary); //filename: the file that will be opened and changed) ifstream modFile ("Mod.dat", ifstream::binary); // (mod.dat is the file that i get the first 1840 hex values from) modFile.seekg (0,modFile.end); size = modFile.tellg(); memblock = new char [size]; modFile.seekg (0, ios::beg); modFile.read (memblock, size); infile.write(memblock, 1840); modFile.close(); infile.close(); cout &lt;&lt; endl; return 0; } </code></pre> <p>Any help would be greatly appreciated, I hope there is some simple way to do this. </p> <p>Solved! thanks all of you very much. My day has been made!(well morning, its 4am)</p>
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    1. USuser2530952
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    1. COI suggest you delete[] your memblock somewhere
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      1. USdoctorlove
 

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