assembly - How do I count the number of characters entered using MIPS? -

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i prompt user enter string of 40 characters. how count how many characters user entered? count each character, need store count of digits, uppercase , lowercase letters, spaces, , other characters. how should recognize difference between these types of characters?

.text                # beginning of code .globl main          # beginning of main  main:                # main procedure    li  $v0, 4        # print_string service number    la  $a0, prompt00 # load address of prompt    syscall           # print prompt     li  $v0, 8        # read_string service number    la  $a0, buffer   # load address of buffer    la  $a1, 40       # max length of 40    syscall           # read_string     li $v0, 4         # print_string service number    la $a0, buffer    # load address of buffer    syscall           # print buffer     li  $v0, 10       # using service 10, terminate    syscall           # terminate  .data                # beginning of data area     buffer:           # container input string       .space  40     # max length of 40 characters    newline:          # variable represent newline       .asciiz "\n"   # newline character     prompt00: .asciiz "enter 40 characters: "

you can check see if character in register looking @ falls within of applicable ranges: ascii values table.

strings should stored null character '\0' @ end, can find length.


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