diff --git a/cc4e/fc.c b/cc4e/fc.c
new file mode 100644
index 0000000..ede2d3f
--- /dev/null
+++ b/cc4e/fc.c
@@ -0,0 +1,19 @@
+#include <stdio.h>
+
+/* print Fahrenheit-Celsius table
+for f = 0, 20, ..., 300 */
+
+int main() {
+	int lower, upper, step;
+	float fahr, celsius;
+	lower = 0;  /* lower limit of temperature table */
+	upper = 300; /* upper limit */
+	step = 20; /* step size */
+	fahr = lower;
+
+	while (fahr <= upper) {
+		celsius = (5.0/9.0) * (fahr-32.0);
+		printf("%4.0f %6.1f\n", fahr, celsius);
+		fahr = fahr + step;
+	}
+}
diff --git a/cc4e/hello.c b/cc4e/hello.c
new file mode 100644
index 0000000..340ac02
--- /dev/null
+++ b/cc4e/hello.c
@@ -0,0 +1,5 @@
+#include <stdio.h>
+int main() {
+	printf("hello, world\n");
+	return 0;
+}