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  1. #include <vector>
  2. #include <iostream>
  3. #include <fstream>
  4. #include <sstream>
  5.  
  6. class BaseSaveFile {
  7.  
  8. protected:
  9.     std::vector<float> first_vector;
  10.  
  11. public:
  12.     void fill_vector(std::vector<float> fill) {
  13.         first_vector = fill;
  14.     }
  15.     void show_vector() {
  16.         for ( auto x: first_vector )
  17.         std::cout << x << std::endl;
  18.     }
  19.     std::istream& load(std::istream& is){
  20.     	size_t vsize; 
  21.     	if(is.read((char*)&vsize, sizeof(vsize))) {
  22.     	    first_vector.resize(vsize);
  23.     	    is.read((char*)first_vector.data(), vsize*sizeof(float)); 
  24.     	}
  25.     	return is; 
  26.     }
  27.     std::ostream& save(std::ostream& os){
  28.     	size_t vsize=first_vector.size(); 
  29.     	os.write((char*)&vsize, sizeof(vsize));
  30.     	os.write((char*)first_vector.data(), vsize*sizeof(float)); 
  31.     	return os; 
  32.     }
  33.  
  34. };
  35.  
  36.  
  37. class DerivedSaveFile : public BaseSaveFile {
  38.  
  39.  
  40. };
  41.  
  42.  
  43. int main ( int argc, char **argv) {
  44.  
  45.     DerivedSaveFile derived;
  46.     std::vector<float> fill;
  47.     for ( auto i = 0; i < 10; i++) {
  48.         fill.push_back(i);
  49.     }
  50.     derived.fill_vector(fill);
  51.  
  52.     std::cout<<"Original:"<<std::endl; 
  53.     derived.show_vector();
  54.  
  55.     std::stringstream ios;
  56.     derived.save(ios); 
  57.     ios.seekp(0); 
  58.  
  59.     std::cout<<"Reloaded:"<<std::endl; 
  60.     DerivedSaveFile d2; 
  61.     d2.load(ios);
  62.     d2.show_vector();
  63.  
  64. }
Success #stdin #stdout 0s 15240KB
comments (?)
stdin 
Standard input is empty
stdout 
Original:
0
1
2
3
4
5
6
7
8
9
Reloaded:
0
1
2
3
4
5
6
7
8
9
https://ideone.com/dxAZR7
language:
C++14 (gcc 8.3)
created:
7 years ago
visibility:
public

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