Building Paper, Rock, Scissors


T

TooNaive

Hello all,

I'm taking a C class and am having to write a program to play a game
of rock, paper scissors, and with the output of:

You chose paper and I chose rock. You Win

where paper is the players choice, and rock is the computers choice,
for reference i was given the p_r_s.h, compare.c, main.c, selection.c,
and wrt.c, and i have had to build the report.c to describe the
output. I will post what i have so far in this venture, but when i
compile i keep getting 2 fatal errors and i cannot figure out what to
do next. Any help would be greatly appreciated. The files are as
follows:

the report.c file that i am working on is this:

report.c file


#include "p_r_s.h"

void report(outcome result, int *win_cnt_ptr, int *lose_cnt_ptr, int
*tie_cnt_ptr,
p_r_s player_choice, p_r_s machine_choice)

{
switch (result) {
case win:
++*win_cnt_ptr;
if (player_choice == paper)
printf("%27sYou chose paper I chose rock. You win.\n", "");
else if (player_choice == rock)
printf("%27sYou chose rock I chose scissors. You win.\n", "");
else if (player_choice == scissors)
printf("%27sYou chose scissors I chose paper. You win.\n", "");
break;
case lose:
++*lose_cnt_ptr;
if (player_choice == paper)
printf("%27sYou chose paper I chose scissors. You lose.\n", "");
else if (player_choice == rock)
printf("%27sYou chose rock I chose paper. You lose.\n", "");
else if (player_choice == scissors)
printf("%27sYou chose scissors I chose rock. You lose.\n", "");
break;
case tie:
++*tie_cnt_ptr;
if (player_choice == paper)
printf("%27sYou chose paper I chose paper. We tie.\n", "");
else if (player_choice == rock)
printf("%27sYou chose rock I chose rock. We tie.\n", "");
else if (player_choice == scissors)
printf("%27sYou chose scissors I chose scissors. We tie.\n", "");
break;
default:
printf("PROGRAMMER ERROR: Unexpected result!\n\n");
exit(1);

}
}

_____________________________________________________________________________

the
p_r_s.h file:

/* The game of paper, rock, scissors. */

#include <ctype.h> /* for isspace() */
#include <stdio.h> /* for printf(), etc */
#include <stdlib.h> /* for rand() and srand() */
#include <time.h> /* for time() */

enum p_r_s {paper, rock, scissors,
game, help, instructions, quit};
enum outcome {win, lose, tie, error};

typedef enum p_r_s p_r_s;
typedef enum outcome outcome;

outcome compare(p_r_s player_choice,
p_r_s machine_choice);
void wrt_final_status(int win_cnt, int lose_cnt);
void wrt_game_status(int win_cnt, int lose_cnt, int tie_cnt);
void wrt_help(void);
void wrt_instructions(void);
void report_and_tabulate(outcome result,
int *win_cnt_ptr, int *lose_cnt_ptr, int *tie_cnt_ptr);
p_r_s selection_by_machine(void);
p_r_s selection_by_player(void);

____________________________________________________________________________

the
compare.c file:

#include "p_r_s.h"

outcome compare(p_r_s player_choice, p_r_s machine_choice)
{
outcome result;

if (player_choice == machine_choice)
return tie;
switch (player_choice) {
case paper:
result = (machine_choice == rock) ? win : lose;
break;
case rock:
result = (machine_choice == scissors) ? win : lose;
break;
case scissors:
result = (machine_choice == paper) ? win : lose;
break;
default:
printf("\nPROGRAMMER ERROR: Unexpected choice!\n\n");
exit(1);
}
return result;
}

_________________________________________________________________________

the
main.c file:

#include "p_r_s.h"

int main(void)
{
int win_cnt = 0, lose_cnt = 0, tie_cnt = 0;
outcome result;
p_r_s player_choice, machine_choice;

srand(time(NULL)); /* seed the random number generator
*/
wrt_instructions();
while ((player_choice = selection_by_player()) != quit)
switch (player_choice) {
case paper:
case rock:
case scissors:
machine_choice = selection_by_machine();
result = compare(player_choice, machine_choice);
report_and_tabulate(result, &win_cnt, &lose_cnt, &tie_cnt);
break;
case game:
wrt_game_status(win_cnt, lose_cnt, tie_cnt);
break;
case instructions:
wrt_instructions();
break;
case help:
wrt_help();
break;
default:
printf("\nPROGRAMMER ERROR: Cannot get to here!\n\n");
exit(1);
}
wrt_game_status(win_cnt, lose_cnt, tie_cnt);
wrt_final_status(win_cnt, lose_cnt);
return 0;
}

____________________________________________________________________________

the
selection.c file:

#include "p_r_s.h"

p_r_s selection_by_machine(void)
{
return ((p_r_s) (rand() % 3));
}

p_r_s selection_by_player(void)
{
char c;
p_r_s player_choice;

printf("Input p, r, or s: ");
while (isspace((int) (c = getchar()))) /* skip white space
*/
;
switch (c) {
case 'p':
player_choice = paper;
break;
case 'r':
player_choice = rock;
break;
case 's':
player_choice = scissors;
break;
case 'g':
player_choice = game;
break;
case 'i':
player_choice = instructions;
break;
case 'q':
player_choice = quit;
break;
default:
player_choice = help;
break;
}
return player_choice;
}

_________________________________________________________________________

and the wrt.c file:

#include "p_r_s.h"

void wrt_final_status(int win_cnt, int lose_cnt)
{
if (win_cnt > lose_cnt)
printf("CONGRATULATIONS - You won!\n\n");
else if (win_cnt == lose_cnt)
printf("A DRAW - You tied!\n\n");
else
printf("SORRY - You lost!\n\n");
}

void wrt_game_status(int win_cnt, int lose_cnt, int tie_cnt)
{
printf("\n%s\n%s%4d\n%s%4d\n%s%4d\n%s%4d\n\n",
"GAME STATUS:",
" Win: ", win_cnt,
" Lose: ", lose_cnt,
" Tie: ", tie_cnt,
" Total: ", win_cnt + lose_cnt + tie_cnt);
}

void wrt_help(void)
{
printf("\n%s\n",
"---\n"
"The following characters can be used for input:\n"
" p for paper\n"
" r for rock\n"
" s for scissors\n"
" g print the game status\n"
" h help, print this list\n"
" i reprint the instructions\n"
" q quit this game\n");
}

void wrt_instructions(void)
{
printf("\n%s\n",
"---\n"
"PAPER, ROCK, SCISSORS:\n"
" In this game p is for \"paper,\" r is for \"rock,\" and"
" s is for \"scissors.\"\n"
" Both the player and the machine\n"
" will choose one of p, r, or s."
" If the two choices are the same,\n"
" then the game is a tie. Otherwise:\n"
" \"paper covers the rock\" (a win for paper),\n"
" \"rock breaks the scissors\" (a win for rock),\n"
" \"scissors cut the paper\" (a win for scissors).\n"
"\n"
" There are other allowable inputs:\n"
" g for game status (the number of wins so far),\n"
" h for help,\n"
" i for instructions (reprint these instructions),\n"
" q for quit (to quit the game).\n"
"\n"
" This game is played repeatedly until q is entered.\n"
"\n"
" Good luck!\n");
}




Thanks in advance for any help!
 
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T

T.M. Sommers

TooNaive said:
void report(outcome result, int *win_cnt_ptr, int *lose_cnt_ptr, int
*tie_cnt_ptr,
p_r_s player_choice, p_r_s machine_choice)

This is the function you wrote, ...
void report_and_tabulate(outcome result,
int *win_cnt_ptr, int *lose_cnt_ptr, int *tie_cnt_ptr);

.... but this is the function the rest of the code expects.

The function you wrote is never called, and the one that is
called does not exist.
 
T

TooNaive

Thanks T.M. for your help, but i am still getting an error when i
compile. I am using Microsoft Visual Studio.net and whenever i compile
i get this error:

report.cpp(5) : error C2447: '{' : missing function header (old-style
formal list?)

the line it references is this one:

1.#include "p_r_s.h"
2.
3.void report_and_tabulate(outcome result, int *win_cnt_ptr, int
4.*lose_cnt_ptr, int *tie_cnt_ptr);
5."This line here"
6. {
7. switch (result) {

I have tried adding more {'s, taking away {'s and even went and
re-studied the entire definition of "function headers" and have still
drawn a blank. Could it be my compiler? I know microsoft just loves
adding little bugs in all their software. Any suggestions would be
greatly appreciated. Thanks again!
 
C

Case

TooNaive said:
Thanks T.M. for your help, but i am still getting an error when i
compile. I am using Microsoft Visual Studio.net and whenever i compile
i get this error:

report.cpp(5) : error C2447: '{' : missing function header (old-style
formal list?)

the line it references is this one:

1.#include "p_r_s.h"
2.
3.void report_and_tabulate(outcome result, int *win_cnt_ptr, int
4.*lose_cnt_ptr, int *tie_cnt_ptr);
5."This line here"
6. {
7. switch (result) {

I have tried adding more {'s, taking away {'s and even went and
re-studied the entire definition of "function headers" and have still
drawn a blank. Could it be my compiler? I know microsoft just loves
adding little bugs in all their software. Any suggestions would be
greatly appreciated. Thanks again!

Try the usual technique: strip away as much code as possible, ending
up with a very small program that stil has this problem. There's a
good chance you'll find what's wrong in the process. If not, post
the few lines you've left here.

HTH

Case
 
Y

Yu SONG

TooNaive said:
Thanks T.M. for your help, but i am still getting an error when i
compile. I am using Microsoft Visual Studio.net and whenever i compile
i get this error:

report.cpp(5) : error C2447: '{' : missing function header (old-style
formal list?)

the line it references is this one:

1.#include "p_r_s.h"
2.
3.void report_and_tabulate(outcome result, int *win_cnt_ptr, int
4.*lose_cnt_ptr, int *tie_cnt_ptr);
5."This line here"
6. {
7. switch (result) {

I have tried adding more {'s, taking away {'s and even went and
re-studied the entire definition of "function headers" and have still
drawn a blank. Could it be my compiler? I know microsoft just loves
adding little bugs in all their software. Any suggestions would be
greatly appreciated. Thanks again!

It said "report.cpp(5)"...
(try making a file named "report.c")


--
Song

/* E-mail.c */
#define User "Y.Song"
#define Warwick "dcs.warwick.ac.uk"
int main() {
printf("Yu Song's E-mail: %[email protected]%s", User, Warwick);
return 0;}

Further Info. : http://www.dcs.warwick.ac.uk/~esubbn/
_______________________________________________________
 
S

Simon Massey

Try removing the ; at the end of line 4, with this it is a function
prototype and the body is not part of it.
 
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M

Martin Ambuhl

TooNaive said:
Thanks T.M. for your help, but i am still getting an error when i
compile. I am using Microsoft Visual Studio.net and whenever i compile
i get this error:

report.cpp(5) : error C2447: '{' : missing function header (old-style
formal list?)

the line it references is this one:

1.#include "p_r_s.h"
2.
3.void report_and_tabulate(outcome result, int *win_cnt_ptr, int
4.*lose_cnt_ptr, int *tie_cnt_ptr);
^^^
What is this semicolon doing here?
5."This line here"
^^^^^^^^^^^^^^^^
And why is this line outside the braces of the function body?
6. {
7. switch (result) {

I have tried adding more {'s, taking away {'s and even went and
re-studied the entire definition of "function headers" and have still
drawn a blank. Could it be my compiler? I know microsoft just loves
adding little bugs in all their software.

It looks like you have inserted two massive bugs into your software.
 
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T

T.M. Sommers

TooNaive said:
Thanks T.M. for your help, but i am still getting an error when i
compile. I am using Microsoft Visual Studio.net and whenever i compile
i get this error:

report.cpp(5) : error C2447: '{' : missing function header (old-style
formal list?)

the line it references is this one:

1.#include "p_r_s.h"
2.
3.void report_and_tabulate(outcome result, int *win_cnt_ptr, int
4.*lose_cnt_ptr, int *tie_cnt_ptr);

Get rid of the semi-colon at the end.
 

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