чтение

cout<<"Starting read date\n\n";
    file=fopen("date.txt", "r");
    for(int i=0;i<num;i++)
    {
        fread(&el,sizeof(int),1,file);
        mas[i]=el;
    }
    fclose(file);

void steck::input_file()
{
    FILE *file;
    int el,i=0,num;
    file=fopen("date.txt", "w");
    cout<<"Recoding date -"<<endl;
    cout << "Enter num of elements-> ";
    cin >> num;
    for (i=1; i<=num; i++)
    { 
        cout << "Enter value of element-> ";
        cin>>el;
        fprintf(file,"%d",el);
    }
    fclose(file);
    cout<<"\nRecoding is complete\n";
    loading();
    system("cls");
    cout<<"Starting read date\n\n";
    file=fopen("date.txt", "r");
    for(int i=0;i<num;i++)
    {
        fread(&el,sizeof(int),1,file);
        mas[i]=el;
    }
    fclose(file);
    cout<<endl<<"\n\nReading is complete\n\n"<<endl;
    loading();
    loading();
    system("cls");
}

for (i = 0; i < num; i++)
{ 
      cout << "Enter value of element-> ";
      cin >> el;
      fwrite((const char*)&el, sizeof(int), 1, file);
}

void steck::input_file()
{
    FILE *file;
    int el,i=0,num;
    file=fopen("date.txt", "wb");
    cout<<"Recoding date -"<<endl;
    cout << "Enter num of elements-> ";
    cin >> num;
    for (i=1; i<=num; i++)
    { 
        cout << "Enter value of element-> ";
        cin>>el;
        fprintf(file,"%d",el);
    }
    fclose(file);
    cout<<"\nRecoding is complete\n";
    loading();
    system("cls");
    cout<<"Starting read date\n\n";
    file=fopen("date.txt", "rb");
    for(int i=0;i<num;i++)
    {
        fread(&el,sizeof(int),1,file);
        mas[i]=el;
    }
    fclose(file);
    cout<<endl<<"\n\nReading is complete\n\n"<<endl;
    loading();
    loading();
    system("cls");
}

#include <cstdio>
 
int main ()
{
 //запись
  FILE * wFile;
  int numbers[] = { 30 , 40 , 50 };
  wFile = fopen ( "myfile.bin" , "wb" );
  fwrite (numbers , sizeof(int) , 3 , wFile );
  fclose (wFile);
 
//чтение
  FILE * rFile;
  int results[4];
  rFile = fopen ( "myfile.bin" , "rb" );
  fread (results , sizeof(int) , 3 , rFile );
  fclose (rFile);
//проверка
  printf("%d %d %d", results[0], results[1], results[2]);
  getchar();
  return 0;
}

void steck::input_file()
{
    FILE *file;
    int el,i=0,num;
    file=fopen("date.bin", "wb");
    cout<<"Recoding date -"<<endl;
    cout << "Enter num of elements-> ";
    cin >> num;
    for (i=1; i<=num; i++)
    { 
        cout << "Enter value of element-> ";
        cin>>el;
        //fprintf(file,"%d",el);
        fwrite (&el , sizeof(int) , 1 , file );
    }
    fclose(file);
    cout<<"\nRecoding is complete\n";
    loading();
    system("cls");
    cout<<"Starting read date\n\n";
    file=fopen("date.bin", "rb");
    for(int i=0;i<num;i++)
    {
        //fread(&el,sizeof(int),1,file);
        fread (&el , sizeof(int) , 1 , file );
        mas[i]=el;
    }
    fclose(file);
    cout<<endl<<"\n\nReading is complete\n\n"<<endl;
    loading();
    loading();
    system("cls");
}