Correction du tp du 10mars...
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Correction du tp du 10mars...
Ewasx Mer 10 Mar - 16:39
Bits.c
Bits.h
- Code:
#include "bits.h"
unsigned char teste_bit(unsigned char octet,int b){
return (octet & (1 << b))?1:0;
}
void allume_bit(unsigned char *octet,int b){
*octet = (*octet) | (1 << b);
}
void eteint_bit(unsigned char *octet,int b){
*octet = (*octet) & ~(1 << b);
}
Bits.h
- Code:
#ifndef __BITS__H
#define __BITS__H
/*constante qui donne le nombre de bits dans un octet*/
#define CHAR_BIT 8
/* prototypes de fonctions manipulant les bits*/
unsigned char teste_bit(unsigned char octet,int b);
void allume_bit(unsigned char * octet,int b);
void eteint_bit(unsigned char * octet,int b);
#endif
Ewasx- Humain
- Messages : 85
Date d'inscription : 26/09/2009
Age : 35
Localisation : Vitry-Sur-Seine
Re: Correction du tp du 10mars...
Ewasx Mer 10 Mar - 16:42
ensemblre.c
ensemble.h
- Code:
#include "ensemble.h"
#include "bits.h"
#include <stdio.h>
#include <stdlib.h>
void init_ensemble(unsigned char *t){
int i;
for(i = 0 ; i < MAX ; i++){
t[i] = 0;
}
}
void ajoute(int val, unsigned char e[]){
int indice = val / CHAR_BIT;
int b = val % CHAR_BIT;
if(indice >= MAX){
fprintf(stderr,"ATTENTION : la taille max du tableau ne permet par l'ajout de %d\n",val);
return;
}
allume_bit(&(e[indice]),b);
}
void ajoute_ensemble(unsigned char e1[], unsigned char e2[]){
int i,j,val;
for(i = 0 ; i < MAX ; i++){
for(j = 0 ; j < CHAR_BIT ; j++){
val = i * CHAR_BIT +j;
if(appartient(val,e2)){
ajoute(val,e1);
}
}
}
}
void affiche_ensemble(unsigned char e[]){
int i,j;
int prems = 1;
if(e == NULL){
printf("{}\n");
return;
}
printf("{");
for(i = 0 ; i < MAX ; i ++){
for(j = 0 ; j < CHAR_BIT ; j++){
if(teste_bit(e[i],j)){
if(!prems){
printf(",");
}
else{
prems = 0;
}
printf("%d",i * CHAR_BIT + j);
}
}
}
printf("}\n");
}
char appartient(int val, unsigned char e[]){
int indice = val / CHAR_BIT;
int bit = val % CHAR_BIT;
if(indice >= MAX){
return 0;
}
return teste_bit(e[indice],bit);
}
void unio(unsigned char e[],unsigned char e1[],unsigned char e2[]){
int i;
init_ensemble(e);
/* ajoute_ensemble(e,e1);
ajoute_ensemble(e,e2);*/
for(i = 0 ; i < MAX ; i++){
e[i] = e1[i] | e2[i];
}
}
void intersection(unsigned char e[],unsigned char e1[],unsigned char e2[]){
init_ensemble(e);
int i;
for(i = 0 ; i < MAX ; i++){
/*
* for(j = 0 ; j < CHAR_BIT ; j++){
val = i * CHAR_BIT + j;
if(appartient(val,e1) && appartient(val,e2)){
ajoute(val,e);
}
}
*/
e[i] = e1[i] & e2[i];
}
}
int cardinal(unsigned char e[]){
int i,j,cnt = 0;
for(i = 0 ; i < MAX ; i++){
for(j = 0 ; j < CHAR_BIT ; j++){
if(teste_bit(e[i],j)){
cnt++;
}
}
}
return cnt;
}
void complementation(unsigned char eb[],unsigned char e[]){
int i;
for(i = 0 ; i< MAX ; i++){
eb[i] = ~(e[i]);
}
}
void difference(unsigned char e[], unsigned char a[], unsigned char b[]){
init_ensemble(e);
int val;
for(val = 0 ; val < CHAR_BIT * MAX ; val++){
if(appartient(val,a) && ! appartient(val,b)){
ajoute(val,e);
}
}
}
void diff_sym(unsigned char e[],unsigned char a[], unsigned char b[]){
unsigned char c[MAX],d[MAX];
unio(c,a,b);
intersection(d,a,b);
difference(e,c,d);
}
ensemble.h
- Code:
#ifndef __ENSEMBLE__H
#define __ENSEMBLE__H
#define MAX 100
/* prototypes des fonctions */
void init_ensemble(unsigned char e[]);
void ajoute(int val, unsigned char e[]);
void affiche_ensemble(unsigned char e[]);
char appartient(int val,unsigned char e[]);
void unio(unsigned char e[],unsigned char e1[],unsigned char e2[]);
void intersection(unsigned char e[],unsigned char e1[],unsigned char e2[]);
int cardinal(unsigned char e[]);
void complementation(unsigned char eb[],unsigned char e[]);
void difference(unsigned char e[], unsigned char a[], unsigned char b[]);
void diff_sym(unsigned char e[],unsigned char a[], unsigned char b[]);
#endif
Ewasx- Humain
- Messages : 85
Date d'inscription : 26/09/2009
Age : 35
Localisation : Vitry-Sur-Seine
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