FPGAs are hardware, you generally program them with hardware description languages like Verilog.
If you don’t want to buy hardware (reasonable, IMO, since HDL is kind of niche and the boards can be pricey), you could try out the language with something like Verilator. This will let you write Verilog, and then compile it to generate C++ classes which simulate your design.
If you don’t want to buy hardware (reasonable, IMO, since HDL is kind of niche and the boards can be pricey), you could try out the language with something like Verilator. This will let you write Verilog, and then compile it to generate C++ classes which simulate your design.