Avancées du dernier TP

SCR3.1/TP3/ex5_v1.c

@@ -0,0 +1,55 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <math.h>
+
+#define SIZE 1000
+int search(const unsigned char * t,int start,int end)
+{
+	pid_t p;
+	int i, status, moitie = ceil((start + end) / 2);
+	p = fork();
+	switch(p){
+		case -1:
+			exit(1);
+		case 0:
+			for (i = 0; i < moitie; i++){
+				if (t[i] == 0)
+					exit(1);
+			}
+			exit(0);
+		default:
+			for (i = moitie; i <= end; i++){
+				if (t[i] == 0)
+					return 1;
+			}
+			wait(&status);
+			return WEXITSTATUS(status);
+		}
+}
+
+int main(int argc , char * argv[])
+{
+	int i;
+	unsigned char arr[SIZE];
+
+	srandom(time(NULL));
+
+	for (i = 0; i < SIZE; i++)
+		arr[i] = (unsigned char) (random() % 255) + 1;
+
+	printf("Enter a number between 0 and %d: ", SIZE);
+	scanf(" %d", &i);
+	if (i >= 0 && i < SIZE) arr[i] = 0;
+
+	if (search(arr,0,SIZE-1)) 
+		printf("Found !\n");
+	else 
+		printf("Not found !\n");
+	return EXIT_SUCCESS;
+}
+
+

SCR3.1/TP3/ex5_v2.c

@@ -0,0 +1,44 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <math.h>
+
+#define SIZE 1000
+int search(const unsigned char * t,int start,int end, int n)
+{
+	pid_t p;
+	int i, proc, status, partition = ceil((start + end) / n);
+	for (proc = 1; proc <= n;proc++){
+		p = fork();
+		if (p == 0){
+			for (i = 0 + partition * proc
+		}
+}
+
+int main(int argc , char * argv[])
+{
+	int i, n;
+	unsigned char arr[SIZE];
+	if (argc != 2)
+		printf("Usage : %s <nombre de fils à créer entre 1 et 100>", argv[0]);
+	n = (int) strtod(argv[1], NULL);
+	srandom(time(NULL));
+
+	for (i = 0; i < SIZE; i++)
+		arr[i] = (unsigned char) (random() % 255) + 1;
+
+	printf("Enter a number between 0 and %d: ", SIZE);
+	scanf(" %d", &i);
+	if (i >= 0 && i < SIZE) arr[i] = 0;
+
+	if (search(arr,0,SIZE-1, n)) 
+		printf("Found !\n");
+	else 
+		printf("Not found !\n");
+	return EXIT_SUCCESS;
+}
+
+

SCR3.1/TP3/ex7.c

@@ -0,0 +1,36 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <assert.h>
+
+void fils(){
+	srand(getpid());
+	exit(rand()%128);
+}
+
+int main(int argc, char** argv){
+	int i, n, max, status;
+	pid_t p;
+	if (argc != 2){
+		printf("Usage : %s <entier n>", argv[0]);
+		exit(1);
+	}
+	n = (int) strtod(argv[1], NULL);
+       	for (i = 1; i <= n; i++){
+		p = fork();
+		assert(p != 1);
+		if (p == 0)
+			fils();
+	}
+	wait(&status);
+	max = WEXITSTATUS(status);
+	for (i = 2; i <= n; i++){
+		wait(&status);
+		if (WEXITSTATUS(status) > max)
+			max = WEXITSTATUS(status);
+	}
+	printf("Le plus grand nombre choisi par les processus est %d\n", max);
+	exit(0);	
+}