lab4_4.asm

#Laboratory Exercise 5, Sample Code3
.data
string: 	     .space   50
Message1:    .asciiz "Nhap xau"
Message2:    .asciiz "Do dai la "
.text
main:
get_string:   # TODO
	li   $v0, 54
	la   $a0, Message1
	la   $a1, string
	la   $a2, 40
	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=v0+1->length=length+1
	addi $t0, $t0, 1          	# t0=t0+1->i = i + 1
	j    check_char
end_of_str: 
end_of_get_length:
	sub  $t0,$t0,1
print_length: # TODO
	la   $a0,Message2
	li   $v0,4
	syscall 
	li   $v0,1
	move $a0, $t0
	syscall