c++ - how to write and read points to binary file? -


i've programmed code in c++ of ball moves in space (3d points). have movements positions. mean, path points passed.

i have write positions\points binary file , read in order restore movements\path. example, if move ball , right, i'll want save positions passed can read them , draw ball moves same, restore path.

i saw example binary file doesn't me:

 // reading complete binary file  #include <iostream>  #include <fstream>  using namespace std;   ifstream::pos_type size;  char * memblock;   int main () {    ifstream file ("example.bin", ios::in|ios::binary|ios::ate);    if (file.is_open())    {      size = file.tellg();      memblock = new char [size];      file.seekg (0, ios::beg);      file.read (memblock, size);      file.close();       cout << "the complete file content in memory";       delete[] memblock;    }    else cout << "unable open file";    return 0;  }

does create file automatically? where? , writing , reading points (x,y,z) ? should write through binary bytes? or points , file makes binary..?

you can write point (x,y,z) binary file separating coordinates e.g colons, , points semicolons: 

int x=10, y=12, z=13; ofstream outfile("points.bin", ios::binary); if (!outfile)     cerr << "could not open file" << endl; else     outfile << x << ','             << y << ','             << z << ';';

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