实例1 二选一多路选择器
module muxtwo(out a,b,sl);
		input a,b,sl;
		output reg out;
		always@(sl or a or b)
		if(!sl) out=a;
		else out=b转载:https://blog.csdn.net/qq_45941706/article/details/128480299
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					module muxtwo(out a,b,sl);
		input a,b,sl;
		output reg out;
		always@(sl or a or b)
		if(!sl) out=a;
		else out=b