{"id":294,"date":"2012-07-28T17:38:37","date_gmt":"2012-07-29T00:38:37","guid":{"rendered":"http:\/\/blogs.unsw.edu.au\/infs1609\/?p=294"},"modified":"2012-07-28T17:46:46","modified_gmt":"2012-07-29T00:46:46","slug":"lab-week-3-data-types","status":"publish","type":"post","link":"https:\/\/blogs.unsw.edu.au\/infs1609\/blog\/2012\/07\/lab-week-3-data-types\/","title":{"rendered":"Lab Week 3 – Data Types"},"content":{"rendered":"

The exercises below use the\u00a0Tut3.zip<\/a> project for BlueJ.<\/p>\n

Data types<\/h3>\n

What\u00a0data type<\/strong> would you use to represent the following values? Why?<\/p>\n

    \n
  1. The length of a piece of string.<\/li>\n
  2. The number of students at UNSW.<\/li>\n
  3. A person\u2019s age.<\/li>\n
  4. The mass of the sun.<\/li>\n
  5. The exact number of stars in the Milky Way.<\/li>\n
  6. The mathematical constant \u03c0.<\/li>\n<\/ol>\n

    Expressions<\/h3>\n

    What are the\u00a0value<\/strong> and\u00a0type<\/strong> of the following expressions? Test your answers by typing them into the Code Pad in BlueJ. Can you explain the result?<\/p>\n

      \n
    1. 5 \/ 2<\/li>\n
    2. 5 % 2<\/li>\n
    3. 5.0 \/ 2<\/li>\n
    4. 5 \/ 2.0<\/li>\n
    5. 5.0 \/ 2.5<\/li>\n
    6. 5.0f \/ 2<\/li>\n
    7. 1.5 % 1<\/li>\n
    8. 1 \/ 0<\/li>\n
    9. 1.0 \/ 0<\/li>\n
    10. 10000000000 + 1<\/li>\n
    11. 10000000000L + 1<\/li>\n
    12. 10000000000.0 + 1<\/li>\n
    13. 10000000000.0f + 1<\/li>\n<\/ol>\n

      Circle area<\/h3>\n

      The\u00a0circleArea<\/strong> method in the Tut3 class calculates the area of a circle with a given radius.<\/p>\n