自定义版：

#include<bits/stdc++.h>
#include<windows.h>
using namespace std; 
int main()
{
	long long int a;
	cout<<"连击次数: "; 
	cin>>a;
    while(1)
    {
        if(GetAsyncKeyState(VK_SPACE))
        {
            for(int i=1;i<=a;i++)
            {
                mouse_event(MOUSEEVENTF_LEFTDOWN|MOUSEEVENTF_LEFTUP,0,0,0,0);
            }
        }
        Sleep(10); 
    }
    return 0;
}

挂机版：

#include<bits/stdc++.h>
#include<windows.h>
using namespace std; 
int main()
{
    while(1)
    {
        if(GetAsyncKeyState(VK_SPACE))
        {
            while(1)
            {
                mouse_event(MOUSEEVENTF_LEFTDOWN|MOUSEEVENTF_LEFTUP,0,0,0,0);
                if(GetAsyncKeyState(VK_ESCAPE))break;
            }
        }
    }
    return 0;
}

如上。