%数学建模与数学实验
%排队模型的计算机模拟
clc
clear
i = 2;
w = 0;
e(i-1) = 0;
x(i) = exprnd(10);
c(i) = x(i);
b(i) = x(i);

while b(i) <= 480
    y(i) = unifrnd(4,15);
    e(i) = b(i) + y(i);
    w = w + b(i) - c(i);
   
    i = i + 1;
   
    x(i) = exprnd(10);
    c(i) = c(i-1) + x(i);
    b(i) = max(c(i),e(i-1));
end
i = i-2;
t = w/i
m = i

 

 

clc
clear
cs = 100;
for j = 1:cs
    w(j) = 0;

i = 2;
x(i) = exprnd(10);
c(i) = x(i);
b(i) = x(i);

while b(i)<=480;
    y(i) = unifrnd(4,15);
    e(i) = b(i) + y(i);
    w(j) = w(j) + b(i) - c(i);
   
    i = i + 1;
   
    x(i) = exprnd(10);
    c(i) = c(i-1) + x(i);
    b(i) = max(c(i),e(i-1));
end

i = i-2;
t(j) = w(j)/i;
m(j) = i;
end

pt = sum(t)/cs
pm = sum(m)/cs