Question

Modify the program so that the credits and and scores are generated randomly for two other students. Print the same table in requirements 1 and 2 above for each of the two students. ( RUBY)

#input number of courses
print "Enter the number of courses: "
n=gets.to_i #convert string to integer
#create array for grades, letters ,credits and gradepoints
grades=Array.new(n) #create array using new()
letters=Array.new(n)
credits=Array.new(n)
gradePoint=Array.new(n)
#run loop till number of courses
for i in 0..n-1 do
printf "Enter the grade for course %d: ",i+1
grades[i]=gets.to_f #convert string to real number
if(grades[i]>=70 && grades[i]<=100)
letters[i]='A'
gradePoint[i]=4.0
elsif(grades[i]>=60 && grades[i]<=69.99)
letters[i]='B'
gradePoint[i]=3.5
elsif(grades[i]>=50 && grades[i]<=59.99)
letters[i]='C'
gradePoint[i]=2.5
elsif(grades[i]>=40 && grades[i]<=49.99)
letters[i]='D'
gradePoint[i]=1.5
else
letters[i]='F'
gradePoint[i]=0.0
end
printf "Enter the credits for course %d: ",i+1
credits[i]=gets.to_i #convert string to int
end
printf "\n"
printf "CourseNo.\tGrade\tLetter\tCredits\n"
printf "---------\t----- ------- -------\n"
for i in 0..n-1 do
printf "%d\t\t%.1f\t%s\t%.1f\n",i+1,grades[i],letters[i],gradePoint[i]
end
#calculate weighted gpa
creditSum=0
weightedSum=0
weightedGPA=0.0
for i in 0..n-1 do
creditSum=creditSum+credits[i]
weightedSum=weightedSum+(gradePoint[i]*credits[i])
end
weightedGPA=weightedSum/creditSum
#calculate unweightedGPA
gradePointSum=0.0
for i in 0..n-1 do
gradePointSum=gradePointSum+gradePoint[i]
end
unweightedGPA=gradePointSum/n
printf "Total number of courses: %d\n",n
printf "Weighted GPA: %.2f\n",weightedGPA
printf "Unweighted GPA: %.2f\n",unweightedGPA

Answer 1

In case of any query do comment. Please rate answer as well. Thanks

Note: It was printing the data for one student, I added a loop to print data of three students now. for other two students it will generate randomly scores and credits. Please do let me know if you need any other help via comments.

Code:

#input number of courses
print "Enter the number of courses: "
n=gets.to_i #convert string to integer

#run loop to add two more student but it will not ask input from user just generate randomly
for j in 0..2 do
#create array for grades, letters ,credits and gradepoints
grades=Array.new(n) #create array using new()
letters=Array.new(n)
credits=Array.new(n)
gradePoint=Array.new(n)
#run loop till number of courses
for i in 0..n-1 do
if (j > 0)
grades[i] = Random.new.rand(1..100)
credits[i] = Random.new.rand(1..10) #you can change the range as per your credit system
else
printf "Enter the grade for course %d: ",i+1
grades[i]=gets.to_f #convert string to real number
printf "Enter the credits for course %d: ",i+1
credits[i]=gets.to_i #convert string to int
end
if(grades[i]>=70 && grades[i]<=100)
letters[i]='A'
gradePoint[i]=4.0
elsif(grades[i]>=60 && grades[i]<=69.99)
letters[i]='B'
gradePoint[i]=3.5
elsif(grades[i]>=50 && grades[i]<=59.99)
letters[i]='C'
gradePoint[i]=2.5
elsif(grades[i]>=40 && grades[i]<=49.99)
letters[i]='D'
gradePoint[i]=1.5
else
letters[i]='F'
gradePoint[i]=0.0
end
  
end
printf "\n"
printf "CourseNo.\tGrade\tLetter\tCredits\n"
printf "---------\t----- ------- -------\n"
for i in 0..n-1 do
printf "%d\t\t%.1f\t%s\t%.1f\n",i+1,grades[i],letters[i],gradePoint[i]
end
#calculate weighted gpa
creditSum=0
weightedSum=0
weightedGPA=0.0
for i in 0..n-1 do
creditSum=creditSum+credits[i]
weightedSum=weightedSum+(gradePoint[i]*credits[i])
end
weightedGPA=weightedSum/creditSum
#calculate unweightedGPA
gradePointSum=0.0
for i in 0..n-1 do
gradePointSum=gradePointSum+gradePoint[i]
end
unweightedGPA=gradePointSum/n
printf "Total number of courses: %d\n",n
printf "Weighted GPA: %.2f\n",weightedGPA
printf "Unweighted GPA: %.2f\n",unweightedGPA
end

===========screen shot of the code for indentation====

Output: