Batch File To Back Up Source Code Using 7zip

Hi! I have a batch file on my computer that backs up source code without rebuildable files to a hard-written folder. It also adds a date stamp to the filename. It has some flaws, though: 1. It doesn't make sure a subfolder specified on a prompt exists; 2. It doesn't support incremental backups, and 3. You can only use it for a program once a day, otherwise, the first backup is overwritten. If you want this batch file, just tell me.