作者：半点闲
博客：blog.csdn.net/cg_i
邮箱：b_dx@sohu.com
参考书籍：《C和指针》

引子：

大领导的公子就读于美国XXX大学计算机专业，公子多才多艺会吹口琴、玩玉箫、看小人书、占扑星相观人眉宇、风流倜傥、窃玉偷香本想过个几年弄个文凭回国吃皇粮，没曾想外国师傅不懂人情非要布置家庭作业，一时间给公子添优伤，忽想到大洋彼岸老爸有能量，领导得知吩咐喽 速办此事为公子解忧伤，喽 手揣上令放眼四周，角落里发现我两眼放光，可叹我苦逼一枚屁也不敢放，看看题目随手写来对不对公子你自己思量...

作业2：

“B. (20 points) Simulated Dice
The casino game Table Crapsis a dice game in which a number of betting options are available depending on
the eventual roll of a pair of dice. Players may bet "for" or"against" certain outcomes in a dizzying array of
combinations with varying odds. Each round of Crapsbegins with an initial roll of the dice (the so-called
'come-out' roll). The player 'wins' on the initial roll if it totals 7 or 11, and 'Craps out'(loses) if the roll is 2, 3
or 12.

Write a simulation program to determine the probability of winning vs. losing on the first roll in the game of
Craps. Your program must include a void function named diceRollthat will use the rand()function to
provide 2 pseudo-random integer values in the range [1..6] representing a single roll of a pair of (independent)
dice.

Your mainprogram must do the following:
Prompt the user, input an integer seed value and seed the pseudo-random number generator with that
value
Simulate 10,000 dice rolls using the diceRollfunction and determine the number of 'wins' (7, 11)
and 'losses' (2, 3, 12)
Display the number of 'wins' and 'losses', and also the resulting probabilities on the terminal display
(note the theoretical probability for 'win' on the first roll is .2222 and for a 'loss' on the first roll is .1111)

Example:
Enter an integer seed value: 1
Number of wins: 2230
Probability of winning: 0.223
Number of losses: 1098
Probability of losing: 0.1098
Enter an integer seed value: 102
Number of wins: 2258
Probability of winning: 0.2258
Number of losses: 1072
Probability of losing: 0.1072

大意是写一个模拟掷骰子的游戏，每次掷两个骰子每个骰子是一个正方体有6面上面标有1、2、3、4、5、6个圆点，当骰子停止时将每个骰子朝上的点数相加，如果所得的和为2、3或12那么游戏者输掉；和为7、11赢；并模拟1000次掷骼子的结果。”

代码（作业要求用C++实现，老子没心情给就给个C的）：

#include 
  
   
#include 
   
     #define ROLLS 1000 void main() { int i = 0; int numOfDice1; int numOfDice2; int sum; int status = 0; int numOfWin = 0; int numOfLose = 0; unsigned value = 0; printf("Enter an integer seed value:"); scanf("%u",&value); srand(value); for(i = 0; i <= ROLLS; i++){ numOfDice1 = 1 + rand() % 6; numOfDice2 = 1 + rand() % 6; sum = numOfDice1 + numOfDice2; switch(sum){ case 7: case 11: status = 1; numOfWin++; break; case 2: case 3: case 12: status = 0; numOfLose++; break; } } printf("Number of winns:%d\n",numOfWin); printf("Probability of winning:%.3f\n",(float)numOfWin / ROLLS); printf("Number of losses:%d\n",numOfLose); printf("Probability of losing:%.3f\n",(float)numOfLose / ROLLS); }
   
  

结尾：

事由是郁闷了点。但从学习的角度上，我希望各位大虾能给我上述代码批评及建议，毕竟我E文太差不知道题目是否理解的对，也望各位给出建议。我也好从中学到些东西，知识本身是可贵的，小弟在此拜谢了！