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问题描述
对于我的作业，我需要使用MIPS在正面上带有任意字母的输入，然后是数字(例如x123)，然后将5添加到数字，然后打印出最终数字(从示例中，输出为128 )
推荐答案 .data
entmsg: .asciiz "Enter a string:\n"
ui1: .space 20
counter: .space 20
outmsg: .asciiz "The value +5 is:\n"
.text
main:
#Printing the message
li $v0, 4
la $a0, entmsg
syscall
#Saving the text
li $v0, 8
la $a0, ui1
li $a1, 20
syscall
#Count the length of the string
la $t0, ui1 # la means load address (so we load the address of str into $t0)
li $t3, 0 # $t1 is the counter. set it to 0
countChr:
lb $t2, 0($t0) # Load the first byte from address in $t0
beqz $t2, pot # if $t2 == 0 then go to label end
add $t0, $t0, 1 # else increment the address
add $t3, $t3, 1 # and increment the counter of course
j countChr # finally loop
pot:
li $t1, 1 # $t1 is the counter. set it to 1
li $t2, 0 #$t2 is the sum
sub $t3, $t3, $t1
getint:
lbu $t0, ui1($t1) # Load the first byte from address in $t0
beq $t1, $t3, end #NULL terminator found
addi $t0, $t0, -48 #converts t1's ascii value to dec value
mul $t2, $t2, 10 #sum *= 10
add $t2, $t2, $t0 #sum += array[s1]-'0'
addi $t1, $t1, 1 #increment array address
j getint # finally loop
#in the loop take the ascii value of the char and then convert it to an int and then add it to the answer
end:
#Add 5 to number
addi $t2, $t2, 5
#print out second message and text
li $v0, 4
la $a0, outmsg
syscall
#Print out number
#Gets the right answer now I just need to be able to output it
li $v0, 1
add $a0, $zero, $t2
syscall
#Close program
li $v0, 10
syscall
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