mips - QtSpim Character Insertion -

the program accepts single-letter keyboard input @ time. letter inputs must lower case through z (no upper-case or non-letter characters allowed; lower-case letters). 1 letter must input @ time; make sure character lower-case letter.

• in data declaration, declare alphabetized string of letters (named “str”), a-z.

• program must input character keyboard, determine place in string, , make space in string character, inserting in proper alphabetical order.

• after alphabetized string of 26 letters, declare sequence of 30 nulls (using “.space” directive), expansion space string insert characters alphabetized list.

• @ point, can ask print current string (i.e., many letter inserts have been made far) inputting capital p keyboard.

• finally, program must use recursive routine insert letter in correct point in program.

my code far

    .data  str:   .asciiz"abcdefghijklmnopqrstuvwxyz\n"  espace:    .space 30  prompt:    .asciiz "please enter lowercase letter \n"  error1:    .asciiz "error! please input lowercase letter. \n"  answer:    .asciiz "the alphebetized letters far \n"      .text  main:  la $s0,0     li $v0,4     la $a0,prompt     syscall  loop:  li $v0,12     syscall     move $t0,$v0     blt $t0,61,error    #if less     bgt $t0,80,error    #if more z     bge $t0,0x50,print  #when user enters p, print  loop2: lb $t2,str($s0)     #load first byte of string     bge $t0,$t2,store   #if input char=string char, store     addi $s0,$s0,1      #next char in string     j loop  store: la  $t0,str+26     li  $t1,'a'     sb  $t1,($t0)     # append 'a' string     sb  $zero,1($t0)  # add null terminator after 'a'     sw $t0,str($s0)     #store char in string     addi $s0,$s0,1      j loop  error: li $v0,4     la $a0,error1       #print error message     syscall     j loop          #jump loop  print: li $v0,4     la $a0,answer       #print dialogue     syscall     li $v0,4     la $a0,str      #print string     syscall 

i need know how write code inputs character in string