Just another update

Task/Temperature-conversion/AWK/temperature-conversion-2.awk

@@ -0,0 +1,19 @@
+# usage: gawk -f temperature_conversion.awk  input.txt -
+
+BEGIN     { print("# Temperature conversion\n") }
+BEGINFILE { print "# reading", FILENAME
+            if( FILENAME=="-" ) print "# Please enter temperature values in K:\n"
+          }
+
+!NF       { exit }
+
+          { print "Input:" $0 }
+$1<0      { print("K must be >= 0\n"); next }
+          { K = 0+$1
+            printf("K = %8.2f Kelvin degrees\n",K)
+            printf("C = %8.2f\n",  K - 273.15)
+            printf("F = %8.2f\n",  K * 1.8 - 459.67)
+            printf("R = %8.2f\n\n",K * 1.8)
+          }
+
+END       { print("# Bye.") }