| 1 | ###
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| 2 | Returns the real part of complex z
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| 3 |
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| 4 | z real(z)
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| 5 | - -------
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| 6 |
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| 7 | a + i b a
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| 8 |
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| 9 | exp(i a) cos(a)
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| 10 | ###
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| 11 |
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| 12 |
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| 13 |
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| 14 | Eval_real = ->
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| 15 | push(cadr(p1))
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| 16 | Eval()
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| 17 | real()
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| 18 |
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| 19 | real = ->
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| 20 | save()
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| 21 | rect()
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| 22 | p1 = pop()
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| 23 | push(p1)
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| 24 | push(p1)
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| 25 | conjugate()
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| 26 | add()
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| 27 | push_integer(2)
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| 28 | divide()
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| 29 | restore()
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| 30 |
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