diff --git a/.gitignore b/.gitignore
index 2d697d2..da2db83 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,3 @@
 ex1
+ex3
+ex4
diff --git a/Makefile b/Makefile
index ee08819..e390978 100644
--- a/Makefile
+++ b/Makefile
@@ -1,11 +1,13 @@
 CFLAGS=-Wall -g
 
+EXERCISES = ex1 ex3 ex4
 
-all: ex1
+
+all: $(EXERCISES)
 
 
 clean:
-	rm -f ex1
+	rm -f $(EXERCISES)
 
 
 .PHONY: all clean
diff --git a/ex3.c b/ex3.c
new file mode 100644
index 0000000..df2f7ef
--- /dev/null
+++ b/ex3.c
@@ -0,0 +1,12 @@
+#include <stdio.h>
+
+int main()
+{
+    int age = 10;
+    int height = 72;
+
+    printf("I am %d years old.\n", age);
+    printf("I am %d inches tall.\n", height);
+
+    return 0;
+}
diff --git a/ex4.c b/ex4.c
new file mode 100644
index 0000000..df2f7ef
--- /dev/null
+++ b/ex4.c
@@ -0,0 +1,12 @@
+#include <stdio.h>
+
+int main()
+{
+    int age = 10;
+    int height = 72;
+
+    printf("I am %d years old.\n", age);
+    printf("I am %d inches tall.\n", height);
+
+    return 0;
+}