3 Linguaggioc

Premessa ,[object Object],[object Object],[object Object]

Caratteristiche Generali ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Alfabeto ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Identificatori ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Commenti ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Istruzioni ,[object Object],[object Object],[object Object],[object Object]

Parole chiave ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Struttura di un programma C ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Struttura di un programma C ,[object Object],[object Object],[object Object],[object Object]

Struttura di un programma C ,[object Object],[object Object],[object Object],[object Object],file prova.c START STOP

Definizione dei dati ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Tipi ,[object Object],[object Object],[object Object]

Tipi base (primitivi) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

INFORMATICA Cenni sulla Rappresentazione dei dati

char ,[object Object],[object Object],[object Object],[object Object]

int ,[object Object],[object Object],[object Object],[object Object],[object Object]

float e double ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

float e double ,[object Object],[object Object],[object Object],[object Object],[object Object]

Modificatori dei tipi base ,[object Object],[object Object],[object Object],[object Object],[object Object]

short / long ,[object Object],[object Object],[object Object],[object Object]

signed / unsigned ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Altri valori interi ,[object Object],[object Object],[object Object]

Valori speciali ,[object Object],tabulatore vert. null tabulatore orizz. esadecimale ddd return ottale ddd new line backslash pagina nuova doppio apice backspace apostrofo allarme Carattere Sequenza Carattere Sequenza

Tabella riassuntiva 1.7E ± 308 (16 cifre) double 1.7E ± 308 (20 cifre) long double 3.4E ± 38 (7 cifre) float 0 ÷ 4.294.967.295 unsigned long, unsigned long int 0 ÷ 65535 unsigned int, unsigned short int 0 ÷ 255 unsigned, unsigned char, unsigned short 2.147.483.648 ÷ 2.147.483.648 signed long, signed long int 2.147.483.648 ÷ 2.147.483.648 long, long int, -32768 ÷ 32.767 signed short, signed short int -32768 ÷ 32.767 short, short int, signed short -32768 ÷ 32.767 int, signed , signed int -128 ÷ 127 char, signed char Intervallo dei valori Tipo

Direttive ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Definizione di variabili ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Definizione di variabili ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Definizione di variabili ,[object Object],[object Object],[object Object],[object Object],[object Object]

Definizione di costanti ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

La direttiva “define” ,[object Object],[object Object],[object Object],[object Object],[object Object]

La direttiva “define” ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Stringa ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Visibilità delle variabili ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Struttura a blocchi ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],a e b sono definite solo all’interno del blocco!

Visibilità delle variabili - Esempio ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Assegnazioni ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Assegnazioni ,[object Object],[object Object],[object Object],[object Object],[object Object]

Istruzioni di I/O ,[object Object],[object Object],[object Object],[object Object],[object Object]

I/O formattato ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

L’istruzione printf ,[object Object],[object Object],[object Object],[object Object],[object Object]

L’istruzione printf ,[object Object],[object Object],[object Object]

L’istruzione printf ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Specificatori di formato ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Specificatori di formato ,[object Object],[object Object],[object Object]

Esempio ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],2 0.500000 a _ 0.500000***a***2 _

Specificatori di formato ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Esempio (printf) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

L’istruzione scanf ,[object Object],[object Object],[object Object],[object Object]

L’istruzione scanf ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

L’istruzione scanf ,[object Object],[object Object],[object Object]

Esempio ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

L’istruzione scanf ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

I/O ,[object Object],[object Object],[object Object],[object Object]

Espressioni ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Operatori aritmetici ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Operatori aritmetici: esempi ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Conversione forzata di tipo (casting) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Operatori di assegnamento composti ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Operatori di incremento e decremento ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Operatori di incremento e decremento ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Operatori relazionali ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Esempio ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Operatori logici ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Esempio ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Operatori di manipolazione dei bit ,[object Object],[object Object],[object Object],[object Object]

Richiamo: operatori Booleani A AND B A OR B NOT A A XOR B 1 1 1 1 0 0 1 0 A B 1 0 1 0 0 0 1 0 A B 0 1 1 0 A 0 1 1 1 0 0 1 0 A B

Operatori su bit ,[object Object],Binario >> Shift a destra Binario << Shift a sinistra ~ ^ | & Unario Binario Binario Binario NOT bit a bit (complemento a 1) XOR bit a bit OR bit a bit AND bit a bit tipo Operatore Operazione

Operatori su bit: esempi ,[object Object],[object Object],[object Object],x y y x z x z AND NOT 1 1 0 0 0 0 0 0 1 0 1 1 0 0 0 0 1 1 0 0 0 0 0 0 1 0 1 1 0 0 0 0 1 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 1 1 1 1 1 1

Operatori su bit: esempi ,[object Object],[object Object],NOTA: Il significato decimale non è rilevante! OR EXOR 1 1 0 0 0 0 0 0 1 0 1 1 0 0 0 0 1 1 1 1 0 0 0 0 1 1 0 0 0 0 0 0 1 0 1 1 0 0 0 0 0 1 1 1 0 0 0 0

Operatori di shift ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Operatori di shift ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Operatori di shift ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Operatori di manipolazione dei bit ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Operatori bit-a-bit: esempio riassuntivo ,[object Object],[object Object],0 5 4 3 2 1 6 7 0 0 0 0 0 1 0 0

Operatori bit-a-bit: esempio ,[object Object],[object Object],0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1

Operatori bit-a-bit: esempio ,[object Object],[object Object],0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 0

Operatori bit-a-bit: esempio ,[object Object],[object Object],0 0 1 0 1 1 1 1 1 1 1 1 1 1 1 0

Operatori bit-a-bit: esempio ,[object Object],[object Object],bit 0 0 0 1 0 1 1 1 1 1 1 1 1 1 1 1 0 car (val << 5) 1

Operatori bit-a-bit: esempio ,[object Object],[object Object],0 0 1 0 1 1 1 1 1 1 1 1 1 1 1 0 car (val << 5) 0 1 bit 1

Operatori bit-a-bit: esempio ,[object Object],[object Object],0 0 1 0 1 1 1 1 1 1 1 1 1 1 1 0 car (val << 5) 0 1 1 bit 2

Operatori bit-a-bit: esempio ,[object Object],[object Object],0 0 1 0 1 1 1 1 1 1 1 1 1 1 1 0 car (val << 5) 1 0 1 1 bit 3

Operatori bit-a-bit: esempio ,[object Object],[object Object],0 0 1 0 1 1 1 1 1 1 1 1 1 1 1 0 car (val << 5) 0 1 0 1 1 bit 4

Operatori bit-a-bit: esempio ,[object Object],[object Object],0 0 1 0 1 1 1 1 1 1 1 1 1 1 1 0 car (val << 5) 0 1 0 1 1 0 bit 5

Operatori bit-a-bit: esempio ,[object Object],[object Object],0 0 1 0 1 1 1 1 1 1 1 1 1 1 1 0 car (val << 5) 0 1 0 1 1 1 0 bit 6

Operatori bit-a-bit: esempio ,[object Object],[object Object],0 0 1 0 1 1 1 1 1 1 1 1 1 1 1 0 car (val << 5) 0 0 1 0 1 1 1 0 bit 7

Operatori bit-a-bit: esempio ,[object Object],[object Object],Valore finale di car 0 5 4 3 2 1 6 7 0 0 1 0 1 1 1 1 1 1 1 1 1 1 1 0 car (val << 5) 0 0 1 0 1 1 1 0

Esercizio ,[object Object],0 1 0 1 1 1 0 1 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 1<<i (1<<i) & N int bitn (int N, int i) { if (((1 << i) & N) != 0) return 1; else return 0; } N

Istruzione composta ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Operatore sizeof ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Operatore sizeof ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

3 Linguaggioc

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