Sets And Maps - Average Student Grades (90/100)
Здравейте! Реших всички задачи от „Lab: Sets and Maps Advanced“ с изключение на пета - Average Student Grades. В judge ми гърми само тест #8 и не разбирам защо. Какво пропускам? Код: https://pastebin.com/WXzDbrUC
Условие:
1.Average Students Grades
Write a program, which reads the name of a student and their grades and adds them to the student record, then prints grades along with their average grade – ordered the output by the names of the students.
Input
On the first line N – the number of students, then on the next N lines student name with grade.
Examples
|
Input |
Output |
|
7 Ivancho 5.20 Mariika 5.50 Ivancho 3.20 Mariika 2.50 Stamat 2.00 Mariika 3.46 Stamat 3.00 |
Ivancho -> 5.20 3.20 (avg: 4.20) Mariika -> 5.50 2.50 3.46 (avg: 3.82) Stamat -> 2.00 3.00 (avg: 2.50) |
|
4 Vladimir 4.50 Petko 3.00 Vladimir 5.00 Petko 3.66 |
Petko -> 3.00 3.66 (avg: 3.33) Vladimir -> 4.50 5.00 (avg: 4.75) |
|
5 Gosho 6.00 Gosho 5.50 Gosho 6.00 Ivan 4.40 Petko 3.30 |
Gosho -> 6.00 5.50 6.00 (avg: 5.83) Ivan -> 4.40 (avg: 4.40) Petko -> 3.30 (avg: 3.30) |
Hints
- Use a TreeMap (String à ArrayList<Double>)
- Check if the name exists before adding the grade. If it doesn’t, add it to the map.
- Pass through all key-value pairs in the map and print the results.
- Think of way to get the average grades for each student.
Ахаа! Не знаех за този подводен камък. Благодаря за отговора и отделеното време, Петър!