#
# character array
# fill array with letters then print the array
#

        .data
result: .asciiz      "\nThe letters are: "
strarr: .space        26

        .globl        main

        .text
main:

        lui       $t1,0x1001                 # $t1 is addr of data segment
        li        $t2, 26                    # $t2 <- number of letters in alphabet 
                                
        li        $t3, 1                     # $t3 <- 1 (loop counter)
        ori       $t1, $t1, 19               # add 19 to $t1 so it points to strarr
        li        $t0, 0x61                  # $t0 <- ascii value of 'a'

        sb        $t0, 0($t1)                # copy 'a' into strarr

loop:
        addi      $t0, $t0, 1                # $t0 <- next letter (add to ascii value)
        addi      $t1, $t1, 1                # $t1 <- addr of next element in strarr
        sb        $t0, 0($t1)                # copy next letter into strarr
        addi      $t3, $t3, 1                # increment loop counter
        blt       $t3, $t2, loop             # keep looping till all letters stored

        li        $v0, 4                     # syscall code to print string
        lui       $a0, 0x1001                # base addr of data segment
        syscall                              # print result msg

        addi      $t1, $t1, -26              # $t1 <- addr of beginning of strarr
        li        $t3, 0                     # $t3 <- 1 (loop counter)
        li        $v0, 11                    # syscall code to print a char

prlets:
        lb        $a0, 0($t1)                # $a0 <- letter from array
        syscall                              # print the letter
        addi      $t1, $t1, 1                # $t1 <- addr of next letter in strarr
        addi      $t3, $t3, 1                # increment loop counter
        ble       $t3, $t2, prlets           # if more letters to print: keep looping        

        li        $v0, 10                    # syscall code to exit from program
        syscall                              # return