diff --git a/tp1/exo1.c b/tp1/exo1.c
index f52a4a1..75c04b1 100644
--- a/tp1/exo1.c
+++ b/tp1/exo1.c
@@ -35,5 +35,4 @@ int main() {
     printf("Méthode iterative : %d^%d = %d\n", a, b, f_iter(a, b));
     printf("Méthode recursive : %d^%d = %d\n", a, b, f_rec(a, b));
     printf("Méthode d'exponentation rapide : %d^%d = %d\n", a, b, f_exp(a, b));
-    exit(0);
 }
diff --git a/tp1/exo2.c b/tp1/exo2.c
index f501efa..b28e72f 100644
--- a/tp1/exo2.c
+++ b/tp1/exo2.c
@@ -14,5 +14,4 @@ int f(uint x) { return rec(0, x); }
 int main() {
     int x = 3459023;
     printf("Somme des chiffres de %d : %d", x, f(x));
-    exit(0);
 }
diff --git a/tp1/exo3.c b/tp1/exo3.c
index 2a917dd..239f01d 100644
--- a/tp1/exo3.c
+++ b/tp1/exo3.c
@@ -25,5 +25,4 @@ int main() {
     uint k = 3;
     printf("Somme des puissances %d-ièmes des entiers de 1 à %d: %d", k, n,
            f(n, k));
-    exit(0);
 }
diff --git a/tp1/exo4.c b/tp1/exo4.c
index 193b995..022d2e0 100644
--- a/tp1/exo4.c
+++ b/tp1/exo4.c
@@ -14,5 +14,4 @@ uint f(uint x) { return rec(0, x); }
 int main() {
     uint x = 8;
     printf("Nombre de chiffre de %d en binaire: %d", x, f(x));
-    exit(0);
 }
diff --git a/tp1/exo5.c b/tp1/exo5.c
index 5cff6a3..e7a3c83 100644
--- a/tp1/exo5.c
+++ b/tp1/exo5.c
@@ -13,5 +13,4 @@ int main() {
     printf("%d s'écrit binaire : ", x);
     f(x);
     printf("\n");
-    exit(0);
 }
diff --git a/tp1/exo6.c b/tp1/exo6.c
index 64cf4b6..8e1f1fd 100644
--- a/tp1/exo6.c
+++ b/tp1/exo6.c
@@ -22,5 +22,4 @@ int main() {
     uint n = 32413524;
     printf("x = %d et n = %d\n", x, n);
     f(n, x);
-    exit(0);
 }
diff --git a/tp1/exo7.c b/tp1/exo7.c
index dacabb2..3fb8fb1 100644
--- a/tp1/exo7.c
+++ b/tp1/exo7.c
@@ -1,17 +1,31 @@
 #include <stdio.h>
 #include <stdlib.h>
 
-int f(int a, int b) {
-    int i = 0;
-    while (!((a % i == 0) && (b % i == 0))) {
-        i++;
+uint ppcm(uint a, uint b) {
+    uint i = 2;
+    uint ppcm = 1;
+    while (a != 1 || b != 1) {
+        int da = a % i == 0;
+        int db = b % i == 0;
+        if (da) {
+            a /= i;
+        }
+        if (db) {
+            b /= i;
+        }
+        if (da || db) {
+            ppcm *= i;
+        } else {
+            i++;
+        }
     }
-    return i;
+    return ppcm;
 }
 
+uint f(int a, int b) { return ppcm(abs(a), abs(b)); }
+
 int main() {
     int a = 9;
-    int b = 73;
+    int b = -21;
     printf("ppcm(%d, %d) = %d\n", a, b, f(a, b));
-    exit(0);
 }
diff --git a/tp2/exo10.c b/tp2/exo10.c
index 70ff976..214d47a 100644
--- a/tp2/exo10.c
+++ b/tp2/exo10.c
@@ -1,6 +1,5 @@
 #include <stdio.h>
 #include <stdlib.h>
-#include <string.h>
 
 void f(const char s[], char *ext) {
     uint i = 0;