diff --git a/1-4.c b/1-4.c
new file mode 100644
index 0000000..7f533f9
--- /dev/null
+++ b/1-4.c
@@ -0,0 +1,17 @@
+#include <stdio.h>
+int main(){
+  float fahr, celsius;
+  float lower, upper, step;
+
+  lower = 0;      /* lower limit of temperature scale */
+  upper = 300;    /* upper limit */
+  step = 20;      /* step size */
+
+  celsius = lower;
+  printf("fahrenheit celsius\n");
+  while (celsius <= upper) {
+    fahr = ((9.0/5.0) * celsius)+32.0;
+    printf("%10.0f %7.1f\n", celsius, fahr);
+    celsius = celsius + step;
+  }
+}