diff --git a/c_primer_plus/chapter05/02.c b/c_primer_plus/chapter05/02.c
new file mode 100644
index 0000000..7a8d02b
--- /dev/null
+++ b/c_primer_plus/chapter05/02.c
@@ -0,0 +1,27 @@
+#include <stdio.h>
+
+
+
+int main (void) {
+
+  int number;
+  int i;
+
+  printf("Give a number: ");
+
+  if (scanf("%d", &number) != 1) {
+    printf("Not a number!\n");
+    return 1;
+  }
+
+  i = number;
+
+  while (i <= number + 10) {
+    printf("%d ", i++);
+  }
+
+  printf("\n");
+
+  return 0;
+
+}
\ No newline at end of file
diff --git a/c_primer_plus/chapter05/03.c b/c_primer_plus/chapter05/03.c
new file mode 100644
index 0000000..07f7f55
--- /dev/null
+++ b/c_primer_plus/chapter05/03.c
@@ -0,0 +1,39 @@
+#include <stdio.h>
+
+
+
+#define DAYS_PER_WEEK 7
+
+
+unsigned getDays(void);
+
+
+int main (void) {
+
+  int days;
+
+  days = getDays();
+
+  while (days != 0) {
+    printf("%d days are %d weeks, %d days\n", days, days / DAYS_PER_WEEK, days % DAYS_PER_WEEK);
+    days = getDays();
+  }
+
+  return 0;
+
+}
+
+
+unsigned getDays(void) {
+
+  int days;
+
+  printf("Number of days (<=0 to quit): ");
+
+  if (scanf("%d", &days) != 1 || days <= 0) {
+    days = 0;
+  }
+
+  return days;
+
+}
diff --git a/c_primer_plus/chapter05/04.c b/c_primer_plus/chapter05/04.c
new file mode 100644
index 0000000..e01efbc
--- /dev/null
+++ b/c_primer_plus/chapter05/04.c
@@ -0,0 +1,44 @@
+#include <stdio.h>
+#include <float.h>
+
+
+#define CM_PER_FEET 30.48
+#define CM_PER_INCH 2.54
+
+
+double getHeight(void);
+
+
+int main (void) {
+
+  double height;
+
+  height = getHeight();
+
+  while (height != 0) {
+    unsigned feet = height / CM_PER_FEET;
+    double inch = (height - feet * CM_PER_FEET) / CM_PER_INCH;
+    printf("%.2f cm = %u feet, %.1f inches\n", height, feet, inch);
+    height = getHeight();
+  }
+
+  printf("bye\n");
+
+  return 0;
+
+}
+
+
+double getHeight(void) {
+
+  double height;
+
+  printf("Enter a height in centimeters (<=0 to quit): ");
+
+  if (scanf("%lf", &height) != 1 || height <= 0) {
+    height = 0;
+  }
+
+  return height;
+
+}