Errors when calling ImGui::ShowDemoWindow();

[PolymorphicAgent]

I am completely new to GUI's within C++, as all of my programs so far have been using STDIN and STDOUT. I do, however have a couple of years' experience coding in C++.
That being said, When I attempt to compile my program:

#include<bits/stdc++.h>
#include"../imgui.h"
int main(){
    ImGui::ShowDemoWindow();
}

With the command:

g++ main.cpp

I get the following error:

~/.../imgui/pgm$ g++ main.cpp
/tmp/ccXSwLkL.o: In function `main':
main.cpp:(.text+0xa): undefined reference to `ImGui::ShowDemoWindow(bool*)'
collect2: error: ld returned 1 exit status

Am I supposed to be adding certain compiler flags, or am I just making a stupidly obvious mistake?

[ocornut]

Undefined references mean you aren't linking the compiled object files containing those functions. You'll find ample references about this on the internet.

Once you manage to compile and link, you'll find calling ImGui::ShowDemoWindow()' is absolutely not enough. Refer to the examples/` application for a basic setup.

[PolymorphicAgent]

Figured it out, Now I'm excited!