三种设计模式的加法器，分别是行为及描述，串行模式，并行模式。希望对大家了解加法器有帮助-Adder three design models, and behavior were described, the serial mode, the parallel mode. I hope to help everyone understand adder

四位加法器的verilog实现，用VHDL语言，附tb.v。-Verilog achieve four adder, using VHDL language, with tb.v.

加法器，简单的加法计算器程序，用vb语言实现-Adder, a simple addition calculator program using vb language implementation