.data

numFirst: 	.word 0 	# /****
numSecond: 	.word 0	 	# * Declaring and initializing variables
numThird: 	.word 0  	# *
				# *
i:		.word 0		# *
D:		.word 15	# ****/
				
marks:		.word 10, 20, 30, 40, 30, 60, 70, 80, 90, 99, 64, 12, 56, 64, 79 #Declaring and initializing array 
analysis:	.space 12 	# Reserving space for three 4-byte integers

AGradePrompt:	.asciiz "\nA Grade Marks (70%+) - "
BGradePrompt:	.asciiz "\nB Grade Marks (60%+) - "
CGradePrompt:	.asciiz "\nC Grade Marks (50%+) - "

string:		.asciiz "\nNum: "
string70:	.asciiz "70"
string60:	.asciiz "60"
string50:	.asciiz "50"

		.text
main:
		
lw $s1, numFirst	# Store the value of 'numFirst' in register $s1
lw $s2, numSecond	# Store the value of 'numSecond' in register $s2
lw $s3, numThird	# Store the value of 'numThird' in register $s3

lw $t0, D		# Number of grades in marks array stored in $t1
lw $t1, i		# Loop Counter stored in register $t0


addi $t0, $zero, 0	# Offset for array iteration

arrayLoop:
	beq $t0, 60, exitLoop	# Iterates through 15 times

	lw $t6, marks($t0)	# Loads the offset value from array into register $t6
	
				
	addi $t0, $t0, 4	# Adds 4 to the array offset (1 byte)
	
	slti $t7, $t6, 70	# Sets $t7 to 1 if value in register $t6 is less than 70 - in higher-level this is equal to 'if (marks[i] > 70) grade70()'
	beq $t7, $zero, grade70 # Checks if the value set in the previous line is 1 or 0, if it is 0, it branches to label 'grade70'

	slti $t7, $t6, 60	# Sets $t7 to 1 if value in register $t6 is less than 70 - in higher-level this is equal to 'if (marks[i] > 70) grade70()'
	beq $t7, $zero, grade60 # Checks if the value set in the previous line is 1 or 0, if it is 0, it branches to label 'grade70'

	slti $t7, $t6, 50	# Sets $t7 to 1 if value in register $t6 is less than 70 - in higher-level this is equal to 'if (marks[i] > 70) grade70()'
	beq $t7, $zero, grade50 # Checks if the value set in the previous line is 1 or 0, if it is 0, it branches to label 'grade70'
	
	j arrayLoop		# Loops back to the beggining of the loop
	

grade70:
	addi $s1, $s1, 1	# Adds 1 to $s1 register for each grade over or equal to 70
	j 	arrayLoop	# Loops back to the beginning of loop

grade60:
	addi $s2, $s2, 1	# Adds 1 to $s2 register for each grade over or equal to 60
	j 	arrayLoop	# Loops back to the beginning of loop

grade50:
	addi $s3, $s3, 1	# Adds 1 to $s3 register for each grade over or equal to 50
	j 	arrayLoop	# Loops back to the beginning of loop

exitLoop:	# Loop Finished (All 15 Grades have been iterated through)


	# Storing numFirst ($s1), numSecond ($s2), and numThird ($s3) in analysis array
	
	la $t0, analysis
	
	sw $s1, ($t0)
	sw $s2, 4($t0)
	sw $s3, 8($t0)

	# Additional prints for testing purposes
	
	li $v0, 4
	la $a0, AGradePrompt	# Prints "\nA Grade Marks (70%+) - "
	syscall
	
	li $v0, 1
	move $a0, $s1		# Prints the number of grades equal to or over 70%
	syscall 
	
	li $v0, 4
	la $a0, BGradePrompt	# Prints "\nB Grade Marks (60%+) - "
	syscall
	
	li $v0, 1
	move $a0, $s2		# Prints the number of grades equal to or over 60%
	syscall
	
	li $v0, 4
	la $a0, CGradePrompt	# Prints "\nC Grade Marks (50%+) - "
	syscall
	
	li $v0, 1
	move $a0, $s3		# Prints the number of grades equal to or over 50%
	syscall 
	
	# End of prints
	
	li $v0, 10      	# Terminates program                                                                                                                                                          
	syscall








-----------------------------------------------------------------------





int numFirst, numSecond, numThird;

// Declare degree counters

int i;

// Declare loop counter

int D ;

// Declare number of degree marks to analyse

 

int marks[];

// Array "marks" stores the mark for each student in a course 

int analysis[];

// Array "analysis" stores the degree counters

 

numFirst=0;

// Initialize number of Firsts counter

numSecond=0;

// Initialize number of Seconds counter

numThird=0;

// Initialize number of Thirds counter

D=15;

// Assume 15 grades in the marks array

// Analyse each degree mark

for (i=0; i<D; i++) {

    if(marks[i] >= 70)

           numFirst = numFirst + 1;

    else if(marks[i] >= 60)

           numSecond = numSecond + 1;

    else if(marks[i] >= 50)

            numThird = numThird + 1;

}

 

// Store the degree counters above to the analysis array as follows

analysis[0]=numFirst ;

analysis[1]=numSecond;

analysis[2]=numThird;