ISE编译如下代码出现如下提示，请高手指点！
部分代码如下：module con12(Reset,fin,cout,fout);
input Reset,fin;
output cout,fout;
reg cout;
reg fout;
always @(posedge fin)
if(!Reset && fout<12)
begin
fout = fout+1;
if(fout==10)cout=1;
else cout=0;
end
else
fout = 0;
endmodule
module count1(Fx,Rst,fx1out,fx2out,fx3out,fx4out);
input Fx,Rst;
outputfx1out,fx2out,fx3out,fx4out;
reg fx1out,fx2out,fx3out,fx4out;
wire c1out,c2out,c3out,c4out;
con12 C1(.fin(Fx),.cout(c1out),.fout(fx1out)); ---line 7
con12 C2(.fin(c1out),.cout(c2out),.fout(fx2out)); ---line 8
con12 C3(.fin(c2out),.cout(c3out),.fout(fx3out)); ---line 9
con12 C4(.fin(c3out),.cout(),.fout(fx4out)); ---line 10
endmodule
编译提示：
ERROR:HDLCompilers:246 - "count1.v" line 7 Reference to vector reg 'fx1out' is not a legal net lvalue
ERROR:HDLCompilers:102 - "count1.v" line 7 Connection to output port 'fout' must be a net lvalue
ERROR:HDLCompilers:246 - "count1.v" line 8 Reference to vector reg 'fx2out' is not a legal net lvalue
ERROR:HDLCompilers:102 - "count1.v" line 8 Connection to output port 'fout' must be a net lvalue
ERROR:HDLCompilers:246 - "count1.v" line 9 Reference to vector reg 'fx3out' is not a legal net lvalue
ERROR:HDLCompilers:102 - "count1.v" line 9 Connection to output port 'fout' must be a net lvalue
ERROR:HDLCompilers:246 - "count1.v" line 10 Reference to vector reg 'fx4out' is not a legal net lvalue
ERROR:HDLCompilers:102 - "count1.v" line 10 Connection to output port 'fout' must be a net lvalue
-->
请高手指点下小弟！
谢谢了！ 发现了至少一个问题。
reg fx1out,fx2out,fx3out,fx4out;
这一句不能是reg。模块互联要用wire型变量。 con12模块例化的时候没有指明reset的状态，应该不行吧
c4out 怎么不写到最后一个con12里面去？
没有仔细看明白代码
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