Question

The code below generates 10 random lowercase characters a – z and stores the characters in memory. Expand this code to CAPITALIZE all the characters in memory. Your code should iterate all characters in memory and change their value to their uppercase equivalent. For instance, character ‘a’ would become ‘A and ‘z’ would become ‘Z’.   
Hint: The ASCII table on the backside of this sheet will be necessary in answering this question.

li $t0, 0 # i= 0
move $s0, $gp # copy base adress to s0

#for(i = 0; i<10; i++)
loop: bgt St0, 10, exitloop

#Generate Random Number in to $a0
#Random ASCII value between 97 and 122
li $a1, 25
li $v0, 42
syscall
addi $t2, $a0, 97
  
sw $t2, 0($s0)
addi $t2, $a0, 4
  
addi $t0, $t0, 1#i++
j loop
  
exitLoop:

Answer 1

Please find the code below:::

.data
prompt: .asciiz " Generated random numbers : "
prompt1: .asciiz " Capatilized random numbers : "
.text
li $t0, 0 # i= 0
move $s0, $gp # copy base adress to s0

#for(i = 0; i<10; i++)
loop:
bgt $t0, 10, exitloop

#Generate Random Number in to $a0
#Random ASCII value between 97 and 122
li $a1, 25
li $v0, 42
syscall
addi $t2, $a0, 97
  
sw $t2, 0($s0)
addi $s0, $s0, 4
  
addi $t0, $t0, 1#i++
j loop

exitloop:
li $t0,0
move $s0,$gp

li $v0,4
la $a0,prompt #it will print prompt
syscall
printLoop:
mul $t1,$t0,4
add $t1,$t1,$s0
lw $t1,($t1)
li $v0,11
move $a0,$t1
syscall

li $v0,11
li $a0,' '
syscall

add $t0,$t0,1
blt $t0,10,printLoop

li $t0,0
move $s0,$gp
li $v0,4
la $a0,prompt1 #it will print prompt
syscall
printLoop2:
mul $t1,$t0,4
add $t1,$t1,$s0
lw $t2,($t1)
sub $t2,$t2,32
sw $t2,($t1)
li $v0,11
move $a0,$t2
syscall

li $v0,11
li $a0,' '
syscall

add $t0,$t0,1
blt $t0,10,printLoop2

output: