Example

In this chapter we are going to define the type complex to represent complex numbers. The following example demonstrates the typical uses that one may wish to make of a mathematical type like complex numbers in a model:

• use of data structures
• various types of initializations and assignments
• products, sums and other arithmetic operations
• comparison
• printed output on screen and to a file.

The following model shows how one might work with a new type complex in Mosel:

model "Test complex"
 uses "complex"

 declarations
  c:complex
  t:array(1..10) of complex
 end-declarations

 forall(j in 1..10) t(j):=complex(j,10-j)
 t(5):=complex("5+5i")

 c:=prod(i in 1..5) t(i)
 if c<>0 then
  writeln("product: ",c)
 end-if

 writeln("sum: ", sum(i in 1..10) t(i))
 c:= t(1)*t(3)/t(4) + if(t(2)=0,t(10),t(8)) + t(5) - t(9)
 writeln("result: ", c)

 initializations to "test.dat"
  c t
 end-initializations

end-model