%This?Program‘s?function?is?to?compute?the?node-voltage?at?each?node?
%assuming?that?the?first?node?is?the?Ground?Node.As?the?graphic?theory?
%specificstwo?arrays?are?used?to?record?the?parameter?of?the?electrical?
%components?which?are?confined?to?be?the?following?three?types:?resistor??
%capacitor?inductance?and?independent?voltage?source.?
%And?its?outcome?is?the?voltage?values?at?every?node?except?the?Ground?node（node1）.???
N=4;?%the?number?of?the?nodes?
N=input（‘numbers?of?nodes:?‘）;?
U=zeros（NN）;%This?array?is?used?to?store?the?information?of?voltage?difference%?
R=ones（NN）;%This?array?is?used?to?store?the?information?of?impetance%?
for?a=1:N??%to?initial?the?resistance?between?any?nodes?to?be?infinite?namely?oc.??
????for?b=1:N????????
????????R（ab）=realmax;?????