Created
June 19, 2014 23:15
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| #include <fstream> | |
| #include <iostream> | |
| #include <stdio.h> | |
| using namespace std; | |
| struct binary | |
| { | |
| void generate_write_bin_fail(fstream &fout, char *name,int amount) | |
| { | |
| fout.close(); | |
| fout.open(name, ios::out | ios::app); | |
| for(int i=0; i<amount; i++) | |
| { | |
| fout.write((char*)&i, sizeof(i)); | |
| } | |
| cout<<"Success, file :"<<name<<" has been created!"<<endl; | |
| fout.close(); | |
| }; | |
| int read_amount_of_data(fstream &fin, char *name) | |
| { | |
| fin.close(); | |
| fin.open(name, ios::in); | |
| fin.seekg(0,ios::beg); | |
| int counter=0; | |
| int data; | |
| while (fin) | |
| { | |
| fin.read((char*)&data, sizeof(data)); | |
| if(fin)counter++; | |
| } | |
| fin.close(); | |
| return counter; | |
| }; | |
| void delete_last_two(fstream &file, char *name, int counter) | |
| { | |
| char name2[]="system_data.bin"; | |
| fstream fout(name2, ios::out | ios::app); | |
| file.close(); | |
| file.open(name, ios::in); | |
| int data; | |
| if(counter<=2) | |
| { | |
| file.close(); | |
| fout.close(); | |
| remove(name);//deltes old file | |
| rename(name2,name);//replace with empty | |
| } | |
| else{ | |
| for(int i=0; i<(counter-2); i++) | |
| { | |
| file.read((char*)&data, sizeof(data));//reads data from file | |
| fout.seekg(0, ios::end); | |
| fout.write((char*)&data, sizeof(data));//writes to system_file | |
| } | |
| file.close(); | |
| fout.close(); | |
| remove(name);//deltes old file | |
| rename(name2,name); | |
| } | |
| }; | |
| void print_on_screen_content(fstream &file, char *name) | |
| { | |
| int data; | |
| file.close(); | |
| file.open(name,ios::in); | |
| cout<<"Faila saturs:"<<endl; | |
| while(file) | |
| { | |
| file.read((char*)&data, sizeof(data)); | |
| if(file){cout<<data;}; | |
| }; | |
| cout<<endl; | |
| file.close(); | |
| } | |
| }; | |
| int main() | |
| { | |
| char name[]="yolo.bin"; | |
| binary bin;//crate struct object | |
| fstream file(name, ios::out);//create empty file | |
| cout<<"Cik vertibas savadit binara faila?"<<endl; | |
| int amount; | |
| cin>>amount; | |
| bin.generate_write_bin_fail(file, name, amount); | |
| bin.print_on_screen_content(file,name); | |
| int size; | |
| size = bin.read_amount_of_data(file,name); | |
| bin.delete_last_two(file,name,size); | |
| bin.print_on_screen_content(file,name); | |
| return 0; | |
| } |
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