From 54b971cd87a5c30eff287b57e64f51ae3c763e8c Mon Sep 17 00:00:00 2001
From: Arkitu <arkitu@arkitu.fr>
Date: Tue, 23 Sep 2025 16:10:17 +0200
Subject: [PATCH] tp2 exo 1-4

---
 tp2/exo1.c | 16 ++++++++++++++++
 tp2/exo2.c | 15 +++++++++++++++
 tp2/exo3.c | 19 +++++++++++++++++++
 tp2/exo4.c | 19 +++++++++++++++++++
 4 files changed, 69 insertions(+)
 create mode 100644 tp2/exo1.c
 create mode 100644 tp2/exo2.c
 create mode 100644 tp2/exo3.c
 create mode 100644 tp2/exo4.c

diff --git a/tp2/exo1.c b/tp2/exo1.c
new file mode 100644
index 0000000..2b21057
--- /dev/null
+++ b/tp2/exo1.c
@@ -0,0 +1,16 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+void f(int *a, int *b) {
+    *a = *a ^ *b;
+    *b = *a ^ *b;
+    *a = *a ^ *b;
+}
+
+int main() {
+    int a = 94;
+    int b = 247;
+    printf("Before swap : a=%d | b=%d\n", a, b);
+    f(&a, &b);
+    printf("After swap : a=%d | b=%d\n", a, b);
+}
diff --git a/tp2/exo2.c b/tp2/exo2.c
new file mode 100644
index 0000000..307f8df
--- /dev/null
+++ b/tp2/exo2.c
@@ -0,0 +1,15 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int f(int t[]) {
+    t[0] = t[0] ^ t[1];
+    t[1] = t[0] ^ t[1];
+    t[0] = t[0] ^ t[1];
+}
+
+int main() {
+    int t[3] = {3, 6, 7};
+    printf("t = {%d, %d, %d}\n", t[0], t[1], t[2]);
+    f(t);
+    printf("t = {%d, %d, %d}\n", t[0], t[1], t[2]);
+}
diff --git a/tp2/exo3.c b/tp2/exo3.c
new file mode 100644
index 0000000..8ddf795
--- /dev/null
+++ b/tp2/exo3.c
@@ -0,0 +1,19 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+void f(int t[], uint len) {
+    uint i = 0;
+    while (i + 1 < len) {
+        t[i] = t[i] ^ t[i + 1];
+        t[i + 1] = t[i] ^ t[i + 1];
+        t[i] = t[i] ^ t[i + 1];
+        i++;
+    }
+}
+
+int main() {
+    int t[3] = {3, 6, 7};
+    printf("t = {%d, %d, %d}\n", t[0], t[1], t[2]);
+    f(t, 3);
+    printf("t = {%d, %d, %d}\n", t[0], t[1], t[2]);
+}
diff --git a/tp2/exo4.c b/tp2/exo4.c
new file mode 100644
index 0000000..7375791
--- /dev/null
+++ b/tp2/exo4.c
@@ -0,0 +1,19 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int f(int t[], uint len, int x) {
+    uint i = 0;
+    while (i < len) {
+        if (t[i] == x) {
+            return i;
+        }
+        i++;
+    }
+    return -1;
+}
+
+int main() {
+    int t[3] = {3, 6, 7};
+    printf("emplacement de 6 : %d\n", f(t, 3, 6));
+    printf("emplacement de 4 : %d\n", f(t, 3, 4));
+}