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1 von 8
1
2019
Student:
2
Pag.:
• Tema de proiect … 3
• Consideratii generale … 4
• Algoritmul de rezolvare – pasul 1 … 5
• Algoritmul de rezolvare – pasul 2 … 6
• Algoritmul de rezolvare – pasul 3 … 7
Cuprins
3
Să se scrie un program C++ care determină
câte perechi de elemente consecutive egale
sunt memorate într-o listă simplu înlănțuită de
intregi.
Tema de proiect
4
In conformitate cu tema data, pentru
realizarea proiectului, s-a folosit o lista simplu
inlantuita de elemente ales arbitrar:
Consideratii generale
info info info
HEA
D
●●●
next next next
NUL
L
5
• Pasul 1: initializrea variabilelor:
– Variabila de tip intreg pentru numararea perechilor
de elemente egale consecutive – i se atribuie initial
valoarea 0,
– Variabila de control de tip Boolean care
gestioneaza incrementarea corecta a variabilei de
numarare a perechilor – i se atribuie initial
valaoarea ADEVARAT,
– Pointer de tipul nodului listei initializat dinamic
pentru parcurgerea elementelor din lista simplu
inlantuita – i se atribuie adresa primului element
din lista.
Algoritmul de rezolvare – pasul 1
6
• Pasul 2: numararea perechilor:
– 2.1 parcurgerea listei simplu inlantuite
Se parcurge lista simplu inlantuita pana la penultimul element folosind
o instructiune repetitiva de tip “cat timp” atribuind pointerului adresa
urmatorului element.
– 2.2 verificarea egalitatii a doua elemente consecutive
La fiecare pas al parcurgerii listei se verifica daca valoarea variabilei de
control este ADEVARAT si daca valoarea elementului din nodul current
este egala cu cea a elementului din nodul urmator.
Daca ambele conditii sunt indeplinite se incrementeaza variabila de
numarare cu o unitate, se afiseaza perechea de elemente si I se atribuie
variabilei de control valoarea FALS . Atribuind aceasta valoare variabilei
de control se evita includerea unui element din lista in doua perechi
diferite.
Daca oricare dintre aceste conditii nu este indeplinita i se atribuie
variabilei de control valoarea ADEVARAT.
Algoritmul de rezolvare – pasul 2
7
• Pasul 3: afisarea rezultatelor
– Dupa parcurgerea listei (pointerul a ajuns la
penultimul element) se afiseaza numarul de
perechi de elemente consecutive egale,
respectiv valoarea finala a variabilei de
numarare.
Algoritmul de rezolvare – pasul 3
8

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Proiect asd

  • 2. 2 Pag.: • Tema de proiect … 3 • Consideratii generale … 4 • Algoritmul de rezolvare – pasul 1 … 5 • Algoritmul de rezolvare – pasul 2 … 6 • Algoritmul de rezolvare – pasul 3 … 7 Cuprins
  • 3. 3 Să se scrie un program C++ care determină câte perechi de elemente consecutive egale sunt memorate într-o listă simplu înlănțuită de intregi. Tema de proiect
  • 4. 4 In conformitate cu tema data, pentru realizarea proiectului, s-a folosit o lista simplu inlantuita de elemente ales arbitrar: Consideratii generale info info info HEA D ●●● next next next NUL L
  • 5. 5 • Pasul 1: initializrea variabilelor: – Variabila de tip intreg pentru numararea perechilor de elemente egale consecutive – i se atribuie initial valoarea 0, – Variabila de control de tip Boolean care gestioneaza incrementarea corecta a variabilei de numarare a perechilor – i se atribuie initial valaoarea ADEVARAT, – Pointer de tipul nodului listei initializat dinamic pentru parcurgerea elementelor din lista simplu inlantuita – i se atribuie adresa primului element din lista. Algoritmul de rezolvare – pasul 1
  • 6. 6 • Pasul 2: numararea perechilor: – 2.1 parcurgerea listei simplu inlantuite Se parcurge lista simplu inlantuita pana la penultimul element folosind o instructiune repetitiva de tip “cat timp” atribuind pointerului adresa urmatorului element. – 2.2 verificarea egalitatii a doua elemente consecutive La fiecare pas al parcurgerii listei se verifica daca valoarea variabilei de control este ADEVARAT si daca valoarea elementului din nodul current este egala cu cea a elementului din nodul urmator. Daca ambele conditii sunt indeplinite se incrementeaza variabila de numarare cu o unitate, se afiseaza perechea de elemente si I se atribuie variabilei de control valoarea FALS . Atribuind aceasta valoare variabilei de control se evita includerea unui element din lista in doua perechi diferite. Daca oricare dintre aceste conditii nu este indeplinita i se atribuie variabilei de control valoarea ADEVARAT. Algoritmul de rezolvare – pasul 2
  • 7. 7 • Pasul 3: afisarea rezultatelor – Dupa parcurgerea listei (pointerul a ajuns la penultimul element) se afiseaza numarul de perechi de elemente consecutive egale, respectiv valoarea finala a variabilei de numarare. Algoritmul de rezolvare – pasul 3
  • 8. 8