Question

Lab-3C   Pre-test Loop

Write a MIPS program to count the number of students who failed in a course. The final grades are given in an array. The fail grade is 60.

Example: Array and Output

     .data

NoOfStudents: 10

Values:   60 70 80 50 90 80 55 90 80 70

Output:

2 students failed

     .data

NoOfStudents: 12

Values:   60 70 80 50 90 80 55 90 80 70 55 80

Output:

3 students failed

Answer 1

Given below is the code for the question. Please do rate the answer if it helped. Thank you.

.data
numStudents: .word 12
grades: .word 60 70 80 50 90 80 55 90 80 70 55 80
msg: .asciiz " students failed"

.text
   lw $t0, numStudents #read the size
   li $t1, 0 #initialize loop counter
   la $t2, grades #get address of first array element
   li $t3, 0 #no. of student who failed
  
loop:
   bge $t1, $t0, endloop
   lw $t4, ($t2) #read the current number
   bge $t4, 60, next #not fail student
   add $t3, $t3, 1
next:
   add $t1, $t1, 1 #increment loop counter
   add $t2, $t2, 4 #next element address
   b loop

endloop:
   #print results
  
   #print int
   move $a0, $t3
   li $v0, 1
   syscall

   #print string
   li $v0, 4
   la $a0, msg
   syscall
  
   #exit
   li $v0, 10
   syscall

output
-----

3 students failed
-- program is finished running --