diff --git a/tp2/exo10.c b/tp2/exo10.c
new file mode 100644
index 0000000..70ff976
--- /dev/null
+++ b/tp2/exo10.c
@@ -0,0 +1,26 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+void f(const char s[], char *ext) {
+    uint i = 0;
+    while (s[i] != 0) {
+        char c = s[i];
+        ext[i] = c + ((c >= 65 && c <= 90) * 32) - ((c >= 97 && c <= 122) * 32);
+        i++;
+    }
+    ext[i] = 0;
+}
+
+int main() {
+    char s[256];
+    char s1[] = "baab";
+    char s2[] = "kayak";
+    char s3[] = "Hello Word!";
+    f(s1, s);
+    printf("f(\"%s\") = \"%s\"\n", s1, s);
+    f(s2, s);
+    printf("f(\"%s\") = \"%s\"\n", s2, s);
+    f(s3, s);
+    printf("f(\"%s\") = \"%s\"\n", s3, s);
+}
\ No newline at end of file
diff --git a/tp2/exo4.c b/tp2/exo4.c
index 7375791..cf5f911 100644
--- a/tp2/exo4.c
+++ b/tp2/exo4.c
@@ -1,7 +1,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-int f(int t[], uint len, int x) {
+int f(const int t[], uint len, int x) {
     uint i = 0;
     while (i < len) {
         if (t[i] == x) {
diff --git a/tp2/exo5.c b/tp2/exo5.c
index de04e8b..e581990 100644
--- a/tp2/exo5.c
+++ b/tp2/exo5.c
@@ -1,7 +1,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-int f(int t[], int len, int x) {
+int f(const int t[], int len, int x) {
     int count = 0;
     while (len >= 0) {
         count += t[len] == x;
diff --git a/tp2/exo6.c b/tp2/exo6.c
index 049ba65..a8ab178 100644
--- a/tp2/exo6.c
+++ b/tp2/exo6.c
@@ -16,7 +16,7 @@ void f(int t[], uint len) {
     }
 }
 
-void print_t(int t[], uint len) {
+void print_t(const int t[], uint len) {
     if (len == 0) {
         printf("[]");
         return;
diff --git a/tp2/exo7.c b/tp2/exo7.c
index 71e3acf..f844d86 100644
--- a/tp2/exo7.c
+++ b/tp2/exo7.c
@@ -2,7 +2,7 @@
 #include <stdlib.h>
 
 // Expect t to be a non empty list of columns. Expect res to be of size 2
-void f(int *t, uint rows, uint cols, int res[2]) {
+void f(const int *t, uint rows, uint cols, int res[2]) {
     int i = (rows * cols) - 1;
     int i_max = i;
     while (i > 0) {
@@ -15,7 +15,7 @@ void f(int *t, uint rows, uint cols, int res[2]) {
     res[1] = i_max / cols;
 }
 
-void print_t(int t[], uint len) {
+void print_t(const int t[], uint len) {
     if (len == 0) {
         printf("[]");
         return;
diff --git a/tp2/exo8.c b/tp2/exo8.c
new file mode 100644
index 0000000..995cb46
--- /dev/null
+++ b/tp2/exo8.c
@@ -0,0 +1,17 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+uint f(const char s[]) {
+    uint i = 0;
+    while (1) {
+        if (s[i] == 0) {
+            return i;
+        }
+        i++;
+    }
+}
+
+int main() {
+    char s[] = "Hello World!";
+    printf("La taille de \"%s\" est %d\n", s, f(s));
+}
\ No newline at end of file
diff --git a/tp2/exo9.c b/tp2/exo9.c
new file mode 100644
index 0000000..e5d1f6f
--- /dev/null
+++ b/tp2/exo9.c
@@ -0,0 +1,36 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int f(const char s[]) {
+    uint len = strlen(s);
+    uint i = 0;
+    while (i < len / 2) {
+        if (s[i] != s[len - 1 - i]) {
+            return 0;
+        }
+        i++;
+    }
+    return 1;
+}
+
+int main() {
+    char s1[] = "baab";
+    char s2[] = "kayak";
+    char s3[] = "Hello Word!";
+    if (f(s1)) {
+        printf("\"%s\" est un palindrome\n", s1);
+    } else {
+        printf("\"%s\" n'est pas un palindrome\n", s1);
+    }
+    if (f(s2)) {
+        printf("\"%s\" est un palindrome\n", s2);
+    } else {
+        printf("\"%s\" n'est pas un palindrome\n", s2);
+    }
+    if (f(s3)) {
+        printf("\"%s\" est un palindrome\n", s3);
+    } else {
+        printf("\"%s\" n'est pas un palindrome\n", s3);
+    }
+}
\ No newline at end of file