assemble .s files in the output folder and run the ./main program and prints exit code to stdout

assemble.sh

+#!/bin/bash
+
+# assemble and link
+for filename in ./output/*.s; do
+    /u/cs444/bin/nasm -O1 -f elf -g -F dwarf $filename
+done
+ld -melf_i386 -o main output/*.o
+
+# run main
+./main
+
+# echo the exit code
+echo $?