structure

Hi all :), below is a truss I simulated in a truss calculator. Just wondering, how to solve for the the compression and tension of each member and are there any method that can solve this? This is not homework, I just want to build a truss calculator app so I need to understand the physics...

Hello Everyone, I am new here and I am preparing my self for my upcoming interview and I am confused about in structure and union, what's the exact difference between them. Can anyone suggest me the exact difference and which is better data type?