MIPS - I'm Not getting the right answer :( Can anybody Review :)
 

Hi Guys,
So I started writing this program where i want the user to input a string
of numbers and letters and then i want to print out just the letters from
the sting ignoring all the letters and other characters such at , ; : * &...
I got it to take the string no problem and then i did the bgt and blt 's so
that it skips all the characters i don't want it to use but when it prints out
the resulting string I'm still getting the original string ;( I have no idea
where I made the mistake :( Please give me some ideas ;) thx

.data 

ask:     .asciiz "Type a character string (<31 chars long): " 

count:         .asciiz "number: "

maxlen:  .word 31 

buffer:  .space 31            # allocates 31 bytes of memory in the data segment 

str:     .space 31 

        



.text 

        .globl main



main:         

         li $v0, 4 

         la $a0, ask                  # Print "Type a character string: " 

         syscall 



         la $a0, buffer               # $a0 holds the address of the read buffer 

         lw $a1, maxlen               # Max number of chars (including the end of string char) 

         li $v0, 8                    # Load the service number 

         syscall                      # Call the operating system 



# Copy the buffer into str and replace lower case letters with upper case letters 



         li $t2, 58                   # the ASCII code of ":" 

         li $t3, 47                # the ASCII code of "/" 

         li $t0, 0                    # $t0 is the index

         li $t4, 0



        

loop:         

         lb $t1, buffer($t0)          # fetch a char from the buffer 

         blt $t1, $t2, skip           # the char is before ":", skip it Branch on Less Than

         bgt $t1, $t3, skip           # the char is after "/", skip it  Branch on Greater Than

         



skip:    

         addi $t4, $t4, 1           

         sb $t1, str($t0)             # and store it into str 

         addi $t0, $t0, 1             # increment index 

         bne $t1, $0, loop            # if $t1 <> "end of string" then goto loop 



         



         li $v0, 4 

         la $a0, str                  # Print str 

         syscall 



         sub $t4, $t4, 2

         li $v0, 4

         la $a0, count

         syscall

         move $a0, $t4

         li $v0, 1

         syscall

Re: MIPS - I'm Not getting the right answer :( Can anybody Review :)
 

AHHH i got it ;O) :p