.globl  main
main:


              la $t0, array            # load base address of array
              move $s0, $t0            # save base address for later on

Fill:         jal     pread            # read integer
              move    $t1,$v0          # save it in $t1
              sw $t1, ($t0)            # save integer in array element
              add $t0, $t0, $t0        # double index
              add $t0, $t0, $t0        # double index again (*4)

              beq $t0, 12($t0) , Sum   # wenn bei 12 angekommen, springe zu Sum
              jal Fill                 # sonst fuelle erneut




Sum:          la $t0, $s0              # load base address of array

Loop          lw $t2, 0($t1)           # get the value from the array cell
              add $s2, $t2             # calculate the sum

              add $t0, $t0, $t0        # double index
              add $t0, $t0, $t0        # double index again (*4)

              beq $t0, 12($t0) , pwrite # wenn bei 12 angekommen, springe zu pwrite

              jal loop                 # sonst addiere



Exit:         li      $v0,10           #Exit
              syscall


# pread -- prompt for and read an integer
# on entry:
#    $ra -- return address## on exit:
#    $v0 -- the integer
.text
.globl  pread
pread:      la    $a0,prompt1       # print string
            li    $v0,4             # service 4
            syscall
            li    $v0,5             # read int into $v0
            syscall                 # service 5
            jr    $ra               # return
pwrite:
            la    $a0,prompt2       # print string
            li    $v0,4             # service 4
            syscall
            move  $a0, $s2          # restore from $s2 to $a0
            li    $v0,1             # read int into $v0
            syscall                 # service 1
            jal Exit                # return  to Exit
            nop                     #
            nop                     #


.data
array: .space 16  #1 byte = 4 word = 4 integer
prompt1: .asciiz "Enter an integer: "
prompt2: .asciiz "The sum is: "