#include <stdio.h>
#include <math.h>
#include <time.h>
#define FILENAME "dice_rdme.txt"
int main (void)
{
//prototypes
int dice(int sets);
void print_info(void);
int dicereadback(void);
//title
printf("Commence gamble, test your might \n");
int sets;
srand(time(0));
// user input dialogue
printf("Enter the number of rolls to wager \n");
scanf("%i", &sets);
dice(sets);
dicereadback();
print_info();
return;
}
//general print info
void print_info (void)
{
printf("\n student info \n");
printf("class professor and ta \n ");
printf("HOMEWORK ASSIGNMENT#6 DICE GAME 2.0 \n");
return;
}
//generate games, parse outcome, store
int dice (int sets)
{
FILE * dice_rdme;
int a, b;
int plyrsum = 0;
int j = 0;
int k = 0;
int d, f, dlrsum;
int c[sets], g[sets];
int plyrset = sets;
int dlrset = sets;
dice_rdme = fopen("dice_rdme.txt","w");
for (a=0; a<plyrset; a++)
{
b = 1 + rand() %6;
c[j] = b;
plyrsum += c[j];
fprintf(dice_rdme,"%i ", c[j]);
++j;
// if (b=6)
// a--;
}
if (a == plyrset)
{
fprintf(dice_rdme, "player score = %i \n", plyrsum);
}
for (d=0; d<dlrset; d++)
{
f = 1 + rand() %6;
g[k] = f;
dlrsum += g[k];
fprintf(dice_rdme,"%i ", g[k]);
++k;
// if (f=6)
//d--;
}
if (d == dlrset)
fprintf(dice_rdme, " dealer score = %i \n", dlrsum);
if (c>g)
fprintf(dice_rdme, " \n You win! \n");
if (g>c)
fprintf(dice_rdme, " \n You lose\n ");
fclose(dice_rdme);
return(0);
}
//games are done, spit em back to stdout
int dicereadback(void)
{
FILE * dice_rdme;
char buff[1000];
dice_rdme = fopen("dice_rdme.txt","r");
while(fgets(buff,1000,dice_rdme)!=NULL)
printf("%s",buff);
fclose(dice_rdme);
return(0);
}
在我将plyrsum更改为= 0作为定义之前，我遇到了以下错误，我不明白这些值来自何处。玩家得分似乎默认或使用占位符或地址作为整数（？抓住吸管？）
kettingstad@esc_151:~/workspace $ gcc HW6.c -lm -o hw6test.o
kettingstad@esc_151:~/workspace $ ./hw6test.o
Commence gamble, test your might
Enter the number of rolls to wager
3
6 2 4 player score = 32779
4 6 3 dealer score = 13
You lose, here are some pamphlets for gambling addiction treatment....
kettingstad@esc_151:~/workspace $ ./hw6test.o
Commence gamble, test your might
Enter the number of rolls to wager
3
4 3 5 player score = 32779
2 1 4 dealer score = 7
这里我预先将plyrsum定义为= 0，但我仍然无法解决每次玩家掷出6时我的函数添加额外滚动的问题。我尝试使用嵌套在每个for中的if语句循环，其中为每个玩家生成结果，但我不断收集8 GB .txt文件和一个挂起的程序。该任务要求对txt文件中的分数进行更复杂的回读，但是我创建了现有函数，因此我可以测试函数“int dice（int sets）”
kettingstad@esc_151:~/workspace $ gcc HW6.c -lm -o hw6test.o
kettingstad@esc_151:~/workspace $ ./hw6test.o
Commence gamble, test your might
Enter the number of rolls to wager
6
6 4 2 6 1 player score = 25
1 6 3 3 1 6 dealer score = 20
You win!
`
答案 0 :(得分：0)
有几种方法可以做到这一点。基本上，您只想在发生6时设置标记，保存当前sum，再次滚动，然后take the higher of the two rolls。实现这一目标的一种方法是：
int eroll = 0; /* flag for extra roll (when b = 6) */
int esum = 0; /* extra sum (to keep greater of 2 rolls) */
dice_rdme = fopen ("dice_rdme.txt", "w");
do {
eroll = 0; /* reset eroll */
for (a = 0; a < plyrset; a++) {
b = 1 + rand () % 6;
c[j] = b;
plyrsum += c[j];
fprintf (dice_rdme, "%i ", c[j]);
++j;
if (b == 6) {
eroll = 1; /* set eroll flag */
}
}
if (eroll) {
esum = plyrsum; /* save plyrsum */
fprintf (dice_rdme, "EXTRA ROLL! current sum %i \n", plyrsum);
}
plyrsum = (plyrsum > esum) ? plyrsum : esum; /* keep best roll */
} while (eroll);
<强>输出：
$ ./bin/gameeroll
Commence gamble, test your might
Enter the number of rolls to wager
3
6 2 3 EXTRA ROLL! current sum 11
4 3 3 player score = 21
2 2 3 dealer score = 6
You win!
student info
class professor and ta
HOMEWORK ASSIGNMENT#6 DICE GAME 2.0
注意：只会插入额外的fprintf进行测试。
如前所述，您的所有等效项if (a = whatever)都必须为if (a == whatever)。您需要验证代码中剩余的逻辑。 C是一种完全语言，花点时间考虑每一行。
答案 1 :(得分：0)
// I extracted the common dice roll/sum function for simplicity in the code
// I made use of the #define FILENAME rather than hardcoding the name in
// each call to fopen()
// I added checking of the returned values from the I/O functions
// I added #includes for the items I inserted into the code
// I moved the function prototypes to outside of an function body
// so the compiler will know the proper format of each function call
// at every function call, not just those within the main() function
// I set the return type to void for those functions those (possible)
// returned value is being ignored.
// I modified the format parameter for the call to scanf()
// to allow for any leading white space.
// I inserted the code to enable an additional dice roll when
// a 6 is rolled.
#include <stdio.h> // for scanf(), printf(), etc.
//#include <string.h> // for memset()
#include <time.h> // for time()
#include <errno.h>
#include <stdlib.h>
#define FILENAME "dice_rdme.txt"
//prototypes
void dice(int sets);
void print_info(void);
void dicereadback(void);
int rollSet( int sets, FILE* fp );
int main (void)
{
//title
printf("Commence gamble, test your might \n");
int sets = 0;
srand(time(0)); // initialize random functions
// user input dialogue
printf("Enter the number of rolls to wager \n");
if( 1 != scanf(" %d", &sets) )
{
perror( "scanf" );
exit(0);
}
// implied else, read of roll count successful
if( 0 >= sets )
{ // then invalid value entered
printf( "ERROR: rolls must be greater than 0, exiting");
exit(0);
}
dice(sets);
dicereadback();
print_info();
return(0);
}
//general print info
void print_info (void)
{
printf("\n student info \n");
printf("class professor and ta \n ");
printf("HOMEWORK ASSIGNMENT#6 DICE GAME 2.0 \n");
return;
}
//generate games, parse outcome, store
void dice (int sets)
{
int playerSum = 0; // sum of all player rolls
int dealerSum = 0; // sum of all dealer rolls
FILE * fp;
if( NULL == (fp = fopen(FILENAME,"w")) )
{ // then, open failed
perror("fopen for write");
exit(0);
}
// implied else
playerSum = rollSet( sets, fp );
dealerSum = rollSet( sets, fp );
fprintf(fp, " player score = %d \n", playerSum);
fprintf(fp, " dealer score = %d \n", dealerSum);
if (playerSum > dealerSum)
{
fprintf(fp, " \n You win! \n");
}
else if (playerSum < dealerSum)
{
fprintf(fp, " \n You lose\n ");
}
else
{ // tie
fprintf(fp, " \n you tied \n");
}
fclose(fp);
}
int rollSet( int sets, FILE* fp )
{
int sum = 0; // sum of all dice rolls
int rollValue = 0; // value of individual dice roll
int i = 0; // loop counter
// roll dice, if rollValue = 6, roll again
for (i=0; i<sets; i++)
{
rollValue = 1 + rand() %6; // yields 1....6
sum += rollValue;
fprintf(fp,"%1d ", rollValue);
if( 6 == rollValue )
{ // then allow another roll
i--;
}
}
return( sum );
}
//games are done, spit em back to stdout
void dicereadback(void)
{
char buff[1000];
FILE *fp;
if( NULL == (fp = fopen(FILENAME,"r")) )
{ // then open failed
perror( "fopen for read" );
exit(0);
}
// implied else, open successful
// note: fgets() appends a null terminator to the string
// so no need to pre-format the input buffer
//memset( buff, '\0', sizeof buff);
while( NULL != fgets(buff,1000,fp) )
{
printf("%s",buff);
//memset( buff, '\0', sizeof buff);
}
fclose(fp);
}