C编程101 : Dice game Assignment that adds an extra turn when players roll a 6

Question

#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哪里。玩家分数似乎已默认或用作占位符或地址作为整数(？捕获救命稻草？)

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 

这里我将 plyrsum 预定义为 = 0，但我仍然无法解决让我的函数在每次玩家掷出 6 时添加额外掷骰的问题。我尝试使用嵌套在每个 for 中的 if 语句循环中为每个玩家生成结果，但我总是遇到 8 GB 的 .txt 文件和一个挂起的程序。该作业要求从 txt 文件中更复杂地读回分数，但我创建了现有函数，以便我可以测试函数“int dice(int set)”

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! 

`

Answer 1

有多种方法可以做到这一点。基本上，您只想设置一个标志 if 6发生时，保存当前sum ，再次滚动，然后 take the higher of the two rolls 。实现这一点的一种方法是:

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);

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:额外的fprintf只是为了测试而插入的。

正如已经指出的，您所有的等价物 if (a = whatever)需要if (a == whatever) 。您将需要验证代码中的其余逻辑。 C 是一种精确语言，请花点时间思考每一行。