Ajout de l'exo 7 TP3

TP3/Exo7/exo7.c

@@ -0,0 +1,53 @@
+#include <sys/types.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <string.h>
+#include <sys/wait.h>
+
+void fils(void)
+{
+    int n;
+    srand(getpid());
+    exit(rand() % 128);
+}
+
+int main(int argc, char *argv[])
+{
+    int n, max, status;
+    assert(argc == 2);
+    n = strtol(argv[1], NULL, 0);
+
+    for (int i = 0; i <= n; i++)
+    {
+        pid_t p = fork();
+        assert(p != -1);
+
+        if (p == 0)
+        {
+            fils();
+        }
+    }
+
+    wait(&status);
+
+    if (WIFEXITED(status))
+        max = WEXITSTATUS(status);
+
+    for (int i = 0; i <= n; i++)
+    {
+        wait(&status);
+        if (WIFEXITED(status))
+        {
+            if (WEXITSTATUS(status) > max)
+                max = WEXITSTATUS(status);
+        }
+    }
+
+    printf("Le maximum est %d\n", max);
+    exit(0);
+}