Question

Compose a program to examine the string "Hello, world!\n", and calculate the total decimal numeric value of all the characters in the string (including punctuation marks), less the numeric value of the vowels.
The program should load each letter, add that numerie value to the running total to produce a total sum, and then add the value to a "vowels running total as well. The program will require a loop. You do not need a counter, since the phrase is null terminated. Remember, punctuation (even spaces!) have a numeric value as well.

Answer 1

Answer:

.data

  str:   .asciiz   "Hello, world!\n"

  output:   .asciiz "\nTotal character numeric sum = "

.text

.globl main

main:

  la $t0,str       # Load the address of the string

  li $t2,0       # Initialize the total value to zero

loop:   lb $t1,($t0)       # Load one byte at a time from the string

  beqz $t1,end       # If byte is a null character end the operation

  add $t2,$t2,$t1       # Else add the numeric value of the byte to the running total

  addi $t0,$t0,1       # Increment the string pointer by 1

  b loop           # Repeat the loop

end:

  # Displaying the output

  li $v0,4       # Code to print the string

  la $a0,output       # Load the address of the string

  syscall           # Call to print the output string

  li $v0,1       # Code to print the integer

  move $a0,$t2       # Put the value to be printed in $a0

  syscall           # Call to print the integer

  # Exiting the program

  li $v0,10       # Code to exit program

  syscall           # Call to exit the program

Explanation: