Adicionado exemplo quadrado.c

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;
+}

aulas/02/x10.c

@@ -0,0 +1,10 @@
+#include <stdio.h>
+
+int main(void){
+  int num;
+
+  num = 5;
+
+  printf("%d x 10 = %d\n", num, num *10);
+  return 0;
+}

aulas/02/x10const.c

@@ -0,0 +1,10 @@
+#include <stdio.h>
+
+#define MULT 10 
+
+int main(void){
+	int num =5;
+
+	printf("%d x 10 = %d\n", num, num * MULT);
+	return 0;
+}