#
#  program to get a line of text from user and echo, using SPIM's
#    system calls
#
	.text
	.globl	main
main:
#
# opening linkage (save return address)
#
	addi	$sp,$sp,-4
	sw	$ra,0($sp)
#
# prompt
#
	la	$a0, prompt
	li	$v0, 4		# "print string" syscall
	syscall
#
# get input
#
	la	$a0, ans
	li	$a1, 100
	la	$v0, 8		# "read string" syscall
	syscall
#
# echo
#
	la	$a0, echo
	li	$v0, 4		# "print string" syscall
	syscall
	la	$a0, ans
	li	$v0, 4
	syscall
#
# closing linkage (get return address and restore stack pointer)
#
	lw	$ra,0($sp)
	addi	$sp,$sp,4
	jr	$ra
	.end	main
#
# area for variables and constants
#
	.data
prompt:	.asciiz "Enter a line of text:\n";
echo:	.asciiz "You entered:\n";
ans:	.space	100