C Arrays
1. 氣泡排序
• Sorting data
– Important computing application
– Virtually every organization must sort some data
• Bubble sort (sinking sort)
– Several passes through the array
– Successive pairs of elements are compared
• If increasing order (or identical ), no change
• If decreasing order, elements exchanged
– Repeat
• Example:
– original: 3 4 2 6 7
– pass 1: 3 2 4 6 7
– pass 2: 2 3 4 6 7
– Small elements "bubble" to the top
Write a program to sort an array's values into ascending order using bubble sort.
(Exercise)
2. 決定中位數
Write a program to sort an array and determine median element's value.
int response[ SIZE ] = { 6, 7, 8, 9, 8, 7, 8, 9, 8, 9,
7, 8, 9, 5, 9, 8, 7, 8, 7, 1,
6, 7, 8, 9, 3, 9, 8, 7, 1, 7,
7, 8, 9, 8, 9, 8, 9, 7, 1, 9,
6, 7, 8, 7, 8, 7, 9, 8, 9, 2,
7, 8, 9, 8, 9, 8, 9, 7, 5, 3,
5, 6, 7, 2, 5, 3, 9, 4, 6, 4,
7, 8, 9, 6, 8, 7, 8, 9, 7, 1,
7, 4, 4, 2, 5, 3, 8, 7, 5, 6,
4, 5, 6, 1, 6, 5, 7, 8, 7, 9};
3. 模擬擲1個骰子
Write a program to simulate rolling a six-sided die 6000 times.
(Exercise)
4. 模擬擲2個骰子
Write a program to simulate rolling two six-sided dice 36000 times.
|
One\two |
1 |
2 |
3 |
4 |
5 |
6 |
|
1 |
2 |
3 |
4 |
5 |
6 |
7 |
|
2 |
3 |
4 |
5 |
6 |
7 |
8 |
|
3 |
4 |
5 |
6 |
7 |
8 |
9 |
|
4 |
5 |
6 |
7 |
8 |
9 |
10 |
|
5 |
6 |
7 |
8 |
9 |
10 |
11 |
|
6 |
7 |
8 |
9 |
10 |
11 |
12 |
5. 模擬Craps 遊戲
• Craps simulator
• Rules
– Roll two dice
• 7 or 11 on first throw, player wins
• 2, 3, or 12 on first throw, player loses
• 4, 5, 6, 8, 9, 10 - value becomes player's "point"
– Player must roll his point before rolling 7 to win
(Exercise)
6. 模擬Craps 遊戲1000次
Write a program that runs 1000 games of craps and answers each of the following questions:
a) How many games are won on the first roll, second roll, …, twentieth roll and after the twentieth roll?
b) How many games are lost on the first roll, second roll, …, twentieth roll and after the twentieth roll?
c) What are the chances of winning at craps?
d) What is the average length of a game of craps?
e) Do the chances of winning improve with the length of the game?