| |
/*
SOFTWARE SYSTEM NAME:
SoftHat
MAIN GOAL:
SoftHat is a game where someone wants to lose money to the machine.
USER SPECIFICATION:
A fix account of 100 bucks is assumed. A user places the money onto the desk and guesses under
which of 3 hats the ball resides. Some strange guy is mixing the hats very quickly and the player
has to decide under which hat the ball might be. If he's right he get's the money he placed onto
the desk doubled; if he's wrong he loses his money. Then he might play again to get rich or poor.
BUSINESS REQUIREMENTS:
starting money account of 100 bucks
some money
3 hats
1 ball
mixing algorithm
1 player (the 2nd one is the machine)
player guesses
account modification (more if won, less if lost)
decision for continuation
TECHNICAL REQUIREMENTS:
implementation on some linux systems
C-language
executable on standard Intel machines
PURPOSE AND SCOPE DIAGRAM:
pays money +-------------------------+
O ----------------------------> | |
/|\ guesses ball position | System Under Design |
| ----------------------------> | |
/ \ mixes hats | |
<---------------------------- | |
gives results | |
<---------------------------- | |
+-------------------------+
BUSINESS USE CASES:
<Rule>: User is named "player"
UC1 Player pays money
UC2 Player guesses ball position
UC3 Player decides for next turn
SYSTEM USE CASES:
UC4 System sets starting account
UC5 System mixes the hats
UC6 System proofs result
UC7 Player gets payed back doubled
UC8 Player looses his money
DERIVED USE CASES:
UC9 SYSTEM: Welcome-message
UC10 SYSTEM: Display starting account
UC11 SYSTEM: increments the account by the doubled money
UC12 SYSTEM: decrements the account by the money
USE CASE DESCRIPTIONS:
UC5 System mixes the hats
This use case should have an algorithm for generating a ball position
(i.e. a hat number) randomly. We may use the system time in milliseconds
as a base to generate a really new number every time.
USE CASE ORDER:
UC9 UC4 UC10 UC1 UC5 UC2 UC6 UC7(UC11)/UC8(UC12) UC3
ACTIVITY DIAGRAM:
conceptual specifications implementation
^
| +---------------------------------+
| | UC9: Welcome-message | "Hy, I'm SoftHat." printf (...);
| +---------------------------------+
| |
| |
| V
Banner() +---------------------------------+
| | UC4: set starting account | set variable "Account" int iAccount = 100
| +---------------------------------+
| |
| |
| V
| +---------------------------------+
| | UC10: display starting account | "You have n bucks." printf ("... %d ... \n", iAccount);
| +---------------------------------+
V |
+-------------------->| do {
^ | V
| | +---------------------------------+
Pay() | | UC1: pay money | set variable "Money" int iMoney;
| | +---------------------------------+ scanf ("%d", &iMoney);
V | |
| |
^ V
| +---------------------------------+
Mix() | UC5: mixing | set variable "Position" srand (time (NULL));
| +---------------------------------+ by randomizing algorithm int iPosition = (rand()%3)+1
V |
|
^ V
| +---------------------------------+
Guess() | UC2: guess | set variable "Choice" int iChoice;
| +---------------------------------+ scanf ("%d", &iChoice);
V |
|
^ V
| +---------------------------------+
| < UC6: proof result (equal?) > "Position" equal to "Choice"? if (iPosition == iChoice)
| +---------------------------------+
| / \
| y / \ n
| / \
| / \
| V V
Proof() +-----------------+ +-----------------+
| | UC7: pay back | | UC8: loose | modify variable "Account"
| +-----------------+ +-----------------+
| | |
| | |
| V V
| +-----------------+ +-----------------+
| | UC11: increment | | UC12: decrement | increment variable "Account" iAccount += iMoney;
| | account | | account | or decrement variable "Account" iAccount -= iMoney;
| +-----------------+ +-----------------+
V \ /
\ /
^ V V
| +---------------------------------+
Decide() < UC3: decision > char cAnswer;
| +---------------------------------+ scanf ("%c", &cAnswer);
V / |
^ replay/ |exit
| / |
+------------ V } while (cAnswer == 'y');
DATA:
int iAccount; used by: Banner(), Proof()
int iMoney; used by: Pay(), Proof()
INTERFACES:
void Banner(int *piAccount);
void Pay(int *piMoney);
int Mix(void); returns iPosition
int Guess(void); returns iChoice
void Proof(int iPosition, int iChoice, int *piAccount, int iMoney);
int Decide(void); returns 1 for continue and 0 for exit
GLOSSAR:
Player: is the user using the program, i.e. the player playing the game
*/
#include "stdio.h"
#include "stdlib.h"
#include "time.h"
#define ACCOUNT 100
void Banner(int *piAccount);
void Pay(int *piMoney);
int Mix(void); /* returns iPosition */
int Guess(void); /* returns iChoice */
void Proof(int iPosition, int iChoice, int *piAccount, int iMoney);
int Decide(void); /* returns 1 for continue and 0 for exit */
int main () {
int iAccount;
int iMoney;
Banner (&iAccount);
do {
Pay (&iMoney);
Proof (Mix (), Guess (), &iAccount, iMoney);
} while (Decide () == 1);
return 0;
}
void Banner(int *piAccount) {
printf ("Hy, I'm SoftHat.\n");
printf ("You have %d bucks.\n", *piAccount = ACCOUNT);
}
void Pay(int *piMoney) {
printf ("How much money do you want to lose ;-) ");
scanf ("%d", piMoney);
printf ("\n");
}
int Mix(void) {
srand ((unsigned)time (NULL));
return (rand() % 3) + 1;
}
int Guess(void) {
int iChoice;
do {
printf ("Where is the ball? (1,2,3) ");
scanf ("%d", &iChoice);
printf ("\n");
} while (iChoice < 1 || iChoice > 3);
return iChoice;
}
void Proof(int iPosition, int iChoice, int *piAccount, int iMoney) {
if (iPosition == iChoice) {
/* matches means: player found our ball */
*piAccount += iMoney;
printf ("$$$ Congratulations $$$\n");
} else {
/* no match means: player missed it */
*piAccount -= iMoney;
printf ("--- Sorry, you missed it ---\n");
}
printf ("Your current account is: %d bucks\n", *piAccount);
}
int Decide(void) { /* returns 1 for continue and 0 for exit */
char cAnswer;
do {
printf ("Do you wanna play again? (y/n) ");
scanf ("%c", &cAnswer);
printf ("\n");
} while (cAnswer != 'y' && cAnswer != 'n');
return cAnswer == 'y' ? 1 : 0;
}
|
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> SSE
> Anhang
> Hutspiel
