diff --git a/aulas/02/quadrado.c b/aulas/02/quadrado.c
new file mode 100644
index 0000000..722b2a1
--- /dev/null
+++ b/aulas/02/quadrado.c
@@ -0,0 +1,12 @@
+#include <stdio.h>
+
+int quadrado(int base) {
+    return base * base;
+}
+
+int main(void) {
+    int num = 5;
+
+    printf("%d^2 = %d\n", num, quadrado(num));
+    return 0;
+}