Multiple case function error

[harish3679]

Hi,

I am trying to use multiple cases for a math operation using case{..,..} as
per octave reference. But unfortunately I am getting an error
'enter a value: d
enter cross value: h
error: 'xxpos' undefined near line 24 column 13
error: called from
    crossminmax at line 22 column 1'


I dont know what is going wrong,Here is the code:



y = input('enter a value: ');
switch(y)

case d
  xpos = {d, h, m};
  xneg = {k, h, f};
  
  cross = input('enter cross value: ');
  
case g
  xxpos = {g, h, d};
  xxneg = {f, i, e};
  
  cross = input('enter cross value: ');
  
endswitch

switch(cross)

case {xpos, xxpos}
  max = d+h;
  disp(max)
  
case {xneg, xxneg}
  min = g-f;
  disp(min)
endswitch

Best,
Harish



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