Add ex08/add_chelou.sh

ex08/add_chelou.sh

@@ -1,3 +1,46 @@
 #!/bin/sh
 
-echo hi
+# FT_NBR1="\\'?\"\\\"'\\"
+# FT_NBR2="rcrdmddd"
+
+# FT_NBR1='\"\"!\"\"!\"\"!\"\"!\"\"!\"\"'
+# FT_NBR2="dcrcmcmooododmrrrmorcmcrmomo"
+
+FT_NBR1_BASE="'\\\"?!"
+FT_NBR2_BASE="mrdoc"
+
+OUTPUT_BASE="gtaio luSnemf"
+
+FT_NBR1_DECIMAL="$(
+	printf '%s' "${FT_NBR1}" |
+	tr "'\\\\\"?!" "01234" |
+	xargs -I{} printf '%s\n' 'obase=10; ibase=5; {}' |
+	bc
+)"
+
+FT_NBR2_DECIMAL="$(
+	printf '%s' "${FT_NBR2}" |
+	tr "mrdoc" "01234" |
+	xargs -I{} printf '%s\n' 'obase=10; ibase=5; {}' |
+	bc
+)"
+
+OUTPUT_BASE13="$(
+	printf '%s' "${FT_NBR1_DECIMAL} + ${FT_NBR2_DECIMAL}" |
+	xargs -I{} printf '%s\n' "ibase=10; obase=13; {}" |
+	bc
+)"
+
+unset OUTPUT
+for i in $(seq "$(printf '%s' "${OUTPUT_BASE13}" | wc -c)"); do
+	OUTPUT_BASE_INDEX="$(
+		printf '%s' "${OUTPUT_BASE13}" |
+		cut -c "${i}" |
+		xargs -I{} printf '%s\n' "obase=10; ibase=13; {}" |
+		bc
+	)"
+	CHAR="$(printf '%s' "${OUTPUT_BASE}" | cut -c "$((OUTPUT_BASE_INDEX + 1))")"
+	OUTPUT="${OUTPUT}${CHAR}"
+done
+
+printf '%s\n' "${OUTPUT}"