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Presentation
•
Information Technology (IT)
•
9th Grade
•
Practice Problem
•
Hard
GE GE
FREE Resource
14 Slides • 0 Questions
1
Expresii –formulele pentru
calculul unor
valori,reprezentate in Pascal.
2
Operatori
(simbolurile
operatiilor)
Operanzi:
-constante
-variabile
-referinte de functii
3
<Operator multiplicativ>::= *|/|div|mod|and
<Operator aditiv>::= +|-|or
<Operator relational>::= <|<=|=|>=|>|<>|in
4
factori
termeni
expresii simple
5
6
4)15
5)X
6)p
1)sin(x)
2)not p
3)cos(x)
7
Exemple:
1)15
2)x
3)15*x
4)x*y*z
5)p and q
6)sin(x)/3
8
Exemple:
15
+15
15*x+sin(x)/3
p or q
-a+b-c
sin(x)-3+cos(x)
9
Exemple
1)x*y+cos(z)/4
2)x<15
3)-15
4)x+6>z-3.0
5)15*x+sin(x)/3<>11
6)a>c
10
Categorie
Operatori
Prioritate
operatori
unari
not , @
prima
(cea mai mare)
operetori
multiplicativi
* , / , div ,mod ,and
a doua
operatori
aditivi
+ , - , or
a treia
operatori
relationali
< ,<= , = ,>= ,> , <>, in
a patra
(cea mai mica)
11
Operator
Tipul operanzilor
Tipul rezultatului
+ , - , *
integer
integer
unul integer,altul real
real
/
integer sau real
real
div
integer
integer
mod
integer
integer
not,and,or
boolean
boolean
<,<=,=,>=,>,<>
tipuri identice
boolean
tipuri compatibile
boolean
unul integer,altul real
boolean
12
Functia
Tipul argumentului
Tipul rezultatului
abs(x)
integer sau real
coincide cu tipul lui x
sin(x)
integer sau real
real
cos(x)
integer sau real
real
arctan(x)
integer sau real
real
sqr(x)
integer sau real
coincide cu tipul lui x
sqrt(x)
integer sau real
real
exp(x)
integer sau real
real
ln(x)
integer sau real
real
round(x)
real
integer
trunc(x)
real
integer
odd(i)
integer
boolean
ord(v)
ordinal
integer
pred(v)
ordinal
coincide cu tipul lui v
succ(v)
ordinal
coincide cu tipul lui v
chr(i)
integer
char
eof(f)
fisier
boolean
eoln(f)
fisier
boolean
Tipul rezultatelor furnizate de functiile predefinite
13
1)Analizati tabelul 3.1 pag.69
2)Efectuati ex.1 pag.68-69
3)Transpuneti expresiile PASCAL in notatii
obisnuite:
a)sqr(a)+sqr(b) e)cos(ALFA-BETA)
b)2*a*(b+c) f)sqr(a+b)/(a-b)
c)sqrt( (a+b)/(a-b) ) g)x>0 or q<p
d)exp(x+y) h)not (x and y)
14
Expresii –formulele pentru
calculul unor
valori,reprezentate in Pascal.
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