Lab5-Assignment4.asm

#Laboratory Exercise 5, Assignment 4
.data
	string: .space 50
	Message1: .asciiz "Nhap xau:"
	Message2: .asciiz "Do dai la "
.text
main:	
get_string:
	li $v0, 54
	la $a0, Message1
	la $a1, string
	li $a2, 50
	syscall			
get_length:
	la $a0, string			# a0 = Address(string[0])
	xor $v0, $zero, $zero 		# v0 = length = 0
	xor $t0, $zero, $zero		# t0 = i = 0
check_char:
	add $t1, $a0, $t0		# t1 = a0 + t0 = Address(string[0] + i)
	lb $t2, 0($t1)			# t2 = string[i]
	beq $t2, $zero, end_of_str 	# Is null char?
	addi $v0, $v0, 1		# v0 += 1 => length += 1
	addi $t0, $t0, 1		# t0 += 1 => i += 1
	j check_char
end_of_str:
end_of_get_length:
print_length:
	li $v0, 56
	la $a0, Message2
	la $a1, ($t0)
	syscall