diff --git a/c_primer_plus/chapter05/01 b/c_primer_plus/chapter05/01
new file mode 100755
index 0000000..1908c88
Binary files /dev/null and b/c_primer_plus/chapter05/01 differ
diff --git a/c_primer_plus/chapter05/01.c b/c_primer_plus/chapter05/01.c
new file mode 100644
index 0000000..30a3f82
--- /dev/null
+++ b/c_primer_plus/chapter05/01.c
@@ -0,0 +1,39 @@
+#include <stdio.h>
+
+
+
+#define MIN_PER_HOUR 60
+
+
+unsigned getMinutes(void);
+
+
+int main (void) {
+
+  unsigned min;
+
+  min = getMinutes();
+
+  while (min != 0) {
+    printf("%u minutes are %u:%02u HH:MM\n", min, min/MIN_PER_HOUR, min % MIN_PER_HOUR);
+    min = getMinutes();
+  }
+
+  return 0;
+
+}
+
+
+unsigned getMinutes(void) {
+
+  unsigned min;
+
+  printf("Time in minutes (0 to quit): ");
+
+  if (scanf("%u", &min) != 1) {
+    min = 0;
+  }
+
+  return min;
+
+}
diff --git a/c_primer_plus/chapter05/Makefile b/c_primer_plus/chapter05/Makefile
new file mode 100644
index 0000000..4ccd9a2
--- /dev/null
+++ b/c_primer_plus/chapter05/Makefile
@@ -0,0 +1,10 @@
+SRC := $(shell ls *.c)
+
+
+%: %.c
+	gcc -Wall -Wextra $@.c -o $@
+
+
+.PHONY: clean
+clean:
+	@rm -f ??