diff --git a/1-1/hello b/1-1/hello
new file mode 100755
index 0000000..2299515
Binary files /dev/null and b/1-1/hello differ
diff --git a/1-1/hello.c b/1-1/hello.c
new file mode 100644
index 0000000..05ce120
--- /dev/null
+++ b/1-1/hello.c
@@ -0,0 +1,7 @@
+#include <stdio.h>
+
+int main ()
+{
+  printf("Hello world!\n");
+  return 0;
+}
diff --git a/1-1/hello1-2 b/1-1/hello1-2
new file mode 100755
index 0000000..4753a8d
Binary files /dev/null and b/1-1/hello1-2 differ
diff --git a/1-1/hello1-2.c b/1-1/hello1-2.c
new file mode 100644
index 0000000..55c5515
--- /dev/null
+++ b/1-1/hello1-2.c
@@ -0,0 +1,7 @@
+#include <stdio.h>
+
+int main ()
+{
+  printf("Hello world!\q");
+  return 0;
+}
diff --git a/1-2/temperature b/1-2/temperature
new file mode 100755
index 0000000..9493477
Binary files /dev/null and b/1-2/temperature differ
diff --git a/1-2/temperature.c b/1-2/temperature.c
new file mode 100644
index 0000000..efbb907
--- /dev/null
+++ b/1-2/temperature.c
@@ -0,0 +1,25 @@
+/*
+ * Print a table of Fahrenheit temperatures and their Celsius equivalents.
+ * From K&R 2nd ed., 1-2
+*/
+
+#include <stdio.h>
+
+int main (void) {
+  int fahr, celsius;
+  int lower, upper, step;
+
+  lower = 0;      // Lower limit of temperature scale
+  upper = 300;    // Upper limit of temperature scale
+  step = 20;      // Step size
+
+  fahr = lower;
+  while (fahr <= upper) {
+    celsius = 5 * (fahr-32) / 9;
+    printf("%d\t%d\n", fahr, celsius);
+    fahr = fahr + step;
+  }
+
+  return 0;
+}
+
diff --git a/1-2/temperature2 b/1-2/temperature2
new file mode 100755
index 0000000..5acd3ff
Binary files /dev/null and b/1-2/temperature2 differ
diff --git a/1-2/temperature2.c b/1-2/temperature2.c
new file mode 100644
index 0000000..afe37bb
--- /dev/null
+++ b/1-2/temperature2.c
@@ -0,0 +1,25 @@
+/*
+ * Print a table of Fahrenheit temperatures and their Celsius equivalents.
+ * From K&R 2nd ed., 1-2
+*/
+
+#include <stdio.h>
+
+int main (void) {
+  int fahr, celsius;
+  int lower, upper, step;
+
+  lower = 0;      // Lower limit of temperature scale
+  upper = 300;    // Upper limit of temperature scale
+  step = 20;      // Step size
+
+  fahr = lower;
+  while (fahr <= upper) {
+    celsius = 5 * (fahr-32) / 9;
+    printf("%3d %7d\n", fahr, celsius);
+    fahr = fahr + step;
+  }
+
+  return 0;
+}
+