本程序完成带进位输入输出的四位二进制加法运算，编程思想采用真值表转换成布尔方程式，利用循环语句将一位全加器编为四位加法器。-This procedure is completed into the four-bit input and output binary adder computing, programming thinking of using truth table into a Boolean equation using a loop will be as full adder