Fixed Code

#include<iostream>
#include<iomanip>
#include <windows.h>
using namespace std;
void clearScreen()
{
    HANDLE hOut;
    COORD Position;

    hOut = GetStdHandle(STD_OUTPUT_HANDLE);

    Position.X = 0;
    Position.Y = 0;
    SetConsoleCursorPosition(hOut, Position);
}
int main()
{
    CONSOLE_SCREEN_BUFFER_INFO csbi;
    unsigned int frames;

    GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &csbi);
    frames = csbi.srWindow.Right - csbi.srWindow.Left + 1;

    for(size_t i=1;i<frames-1;i++)
    {
    clearScreen();
    cout<<setw(i-5)<<"     _____"<<endl;
    cout<<setw(i)<<"  __/__|__\\___"<<endl;
    cout<<setw(i)<<"(_)--------(_)|"<<endl;
    Sleep(50);
    cout<< setfill('-') <<setw(frames) << '-' << endl;
    cout << setfill(' ');

    }

    return 0;
}