ftp.barnyard.co.uk/2015.02.ftp.barnyard.co.uk.tar/ftp.barnyard.co.uk/cpm/walnut-creek-CDROM/SIMTEL/CPMUG/CPMUG048.ARK/MM.C

C/C++ Source or Header | 1984-04-29 | 5KB | 181 lines

/*
   Mastermind game, written by:    Stephen A. Ward,
                January, 1980

   Modified for BDS C by:    Leor Zolman,
                February, 1980


   Usage:  mm [ -b ] [ -k ] [ -c# ] [ -p# ]

   where:  -b  tells # of possible solutions before each guess
       -c# sets number of different characters (e.g., "-c4" means A-D)
        (defaults to 6)
       -p# sets number of positions in solution string
        (defaults to 4)
       -k  disables kibitzing (enabled by default.).

    Thus, for example, the invokation
       mm -c10 -p3
    would simulate the game of "Bagels", where the layout is ten different
    characters in three positions. I don't think "Bagels" allows repetitions,
    though, so it isn't QUITE the same...

*/

#define    NPEGS    10        /* Max NPeg        */
#define    MCOLORS    26        /* Max NColors        */
#define NHIST 100

char    Secret[NPEGS+2];    /* was CHAR */
char    History[NHIST*NPEGS];    /* was CHAR */
int    Jots[NHIST];
int    guesses;
int    NColors,        /* Number of colors    */
    NPeg;            /* Number of pegs    */

char    KFlag,            /* Kibitz flag        */
    BFlag;        /* Debug flag        */



main(argc, argv)
 char **argv;
 {
    register int i,j;
    int ngames,ntries;
    ngames = ntries = 0;
    char *trial, *arg;
    NColors = 6;        /* Number of colors    */
    NPeg = 4;        /* Number of pegs    */
    KFlag = 1;        /* Kibitz flag        */
    BFlag = 0;        /* Debug flag        */

    for (i=1; i<argc; i++)
     { if (*(arg = argv[i]) == '-') switch (*++arg) {
        case 'B':    BFlag++; continue;
        case 'K':    KFlag = !KFlag; continue;
        case 'C':    NColors = atoi(++arg);
                if (NColors > MCOLORS) NColors = MCOLORS;
                continue;
        case 'P':    NPeg = atoi(++arg);
                if (NPeg > NPEGS) NPeg = NPEGS;
                continue;
        default:    printf("Illegal option %s\n",
                    argv[i]); exit(-1); }
       else
        { printf("Usage: mm [ -b ] [ -k ] [ -c# ] [ -p# ]\n");
          exit(-1); }}

    printf("Mastermind game:\n");
    printf("  I have a secret string of %d letters ",NPeg);
    printf("between A and %c.\n", 'A' + NColors - 1);
    printf("  Object: find it in as few guesses as possible.\n");
    printf("  For each guess, I will tell you how many\n");
    printf("    Hits (right letter in the right place) and\n");
    printf("    Misses (right letter in the wrong place)\n");
    printf("  you had for that guess.\n");
    printf("  Note: letters may appear more than once in my strings.\n");

    srand1("\nType any character to begin: ");
    getchar();

Game:
    for (i=0; i<NPeg; i++) Secret[i] = rand() % NColors;
    printf("\n\nNew game!\n");
    for (guesses=0;;guesses++)
     { if (BFlag)
         printf("\n   (%d possible secret symbols)\n", Check());
       else if (KFlag && guesses && Check() == 1)
         printf("\nYou should be able to figure it out now!\n");
       if (!rguess("Your test symbol", trial = &History[NPeg*guesses]))
        break;

       j = match(trial, Secret);
       Jots[guesses] = j;

       printf( (j>>4 ? "\t\t\t%d hit" : "\t\t\tno hit"), j>>4);
       if ((j>>4) - 1) putchar('s');

       printf ( (j & 0xf ? ", %d miss" : ", no miss"), j & 0xf);
       if ((j & 0xf) - 1) printf("es");

       putchar('\n');

       if (j == (NPeg << 4))
        { printf("You got it in %d guesses!\n", ++guesses);
          ntries += guesses;
          ngames++;
          i = ntries/ngames;
          printf("Average for %d game%c is %1d.%1d\n",
            ngames,    (ngames != 1) ? 's' : 0x80,
            i , ntries*100 /ngames %100);
          goto Game; }}
    Secret[NPeg] = 0;
    printf("My secret symbol was ");
    for (i=0; i<NPeg; i++) putchar('A' + Secret[i]);
    printf("\n");
    goto Game;
 }

int match(aa, bb)
 char *aa;
 char *bb;
 {    register int i, score;
    char j;
    int temp[MCOLORS];
    score = 0;
    for (i=0; i<NColors; i++) temp[i] = 0;
    for (i=0; i<NPeg; i++)
       if ((j = aa[i]) != bb[i]) temp[j]++;
    for (i=0; i<NPeg; i++)
        { if ((j = bb[i]) == aa[i]) score += 16;
          else if (temp[j]-- > 0) score++; }
    return score; }

int incr(tt)
 char *tt;
 {    register int i;
    i = 0;
    while (i < NPeg)
     { if (++tt[i] < NColors) return 1;
       tt[i] = 0; i++; }
    return 0; }


int Check()
 {    char tt[NPEGS];
    char *hh;
    register int i, j;
    int count;
    count = 0;
    for (i=0; i<NPeg; i++) tt[i] = 0;
    do {
        hh = &(History[0]);
        for (j=0; j<guesses; j++, hh += NPeg)
            if (match(hh, tt) != Jots[j]) goto nope;
        count++;
nope:        i = i;
       } while (incr(tt));
    return count; }


rguess(prompt, where)
 char *where;
 {    register int i, c;
again:    printf("%s:  ", prompt);
    i = strlen(gets(where));
    if (i == 0) return 0;
    if (i > NPeg && !isspace(where[i])) {
             printf("Too many letters\n"); goto again;
     }
    if (i < NPeg) {  printf("Too few letters\n"); goto again; }
    for (i=0; i<NPeg; i++) {
      c = where[i] = toupper(where[i]) - 'A';
       if (c < 0 || c >= NColors)
        { printf("Bad letter -- use A thru %c\n", 'A'+NColors-1);
          goto again; }
     }
    return 1;
}