new files

Task/Bulls-and-cows/C/bulls-and-cows-1.c

@@ -0,0 +1,60 @@
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <curses.h>
+#include <string.h>
+
+#define MAX_NUM_TRIES 72
+#define LINE_BEGIN 7
+#define LAST_LINE 18
+
+int yp=LINE_BEGIN, xp=0;
+
+char number[5];
+char guess[5];
+
+#define MAX_STR 256
+void mvaddstrf(int y, int x, const char *fmt, ...)
+{
+  va_list args;
+  char buf[MAX_STR];
+
+  va_start(args, fmt);
+  vsprintf(buf, fmt, args);
+  move(y, x);
+  clrtoeol();
+  addstr(buf);
+  va_end(args);
+}
+
+void ask_for_a_number()
+{
+  int i=0;
+  char symbols[] = "123456789";
+
+  move(5,0); clrtoeol();
+  addstr("Enter four digits: ");
+  while(i<4) {
+    int c = getch();
+    if ( (c >= '1') && (c <= '9') && (symbols[c-'1']!=0) ) {
+      addch(c);
+      symbols[c-'1'] = 0;
+      guess[i++] = c;
+    }
+  }
+}
+
+void choose_the_number()
+{
+  int i=0, j;
+  char symbols[] = "123456789";
+
+  while(i<4) {
+    j = rand() % 9;
+    if ( symbols[j] != 0 ) {
+      number[i++] = symbols[j];
+      symbols[j] = 0;
+    }
+  }
+}

Task/Bulls-and-cows/C/bulls-and-cows-2.c

@@ -0,0 +1,85 @@
+bool take_it_or_not()
+{
+  int i;
+  int cows=0, bulls=0;
+
+  for(i=0; i < 4; i++) {
+    if ( number[i] == guess[i] ) {
+      bulls++;
+    } else if ( strchr(number, guess[i]) != NULL ) {
+      cows++;
+    }
+  }
+  move(yp, xp);
+  addstr(guess); addch(' ');
+  if ( bulls == 4 ) { yp++; return true; }
+  if ( (cows==0) && (bulls==0) ) addch('-');
+  while( cows-- > 0 ) addstr("O");
+  while( bulls-- > 0 ) addstr("X");
+  yp++;
+  if ( yp > LAST_LINE ) {
+    yp = LINE_BEGIN;
+    xp += 10;
+  }
+  return false;
+}
+
+bool ask_play_again()
+{
+  int i;
+
+  while(yp-- >= LINE_BEGIN) {
+    move(yp, 0); clrtoeol();
+  }
+  yp = LINE_BEGIN; xp = 0;
+
+  move(21,0); clrtoeol();
+  addstr("Do you want to play again? [y/n]");
+  while(true) {
+    int a = getch();
+    switch(a) {
+    case 'y':
+    case 'Y':
+      return true;
+    case 'n':
+    case 'N':
+      return false;
+    }
+  }
+}
+
+
+int main()
+{
+  bool bingo, again;
+  int tries = 0;
+
+  initscr(); cbreak(); noecho();
+  clear();
+
+  number[4] = guess[4] = 0;
+
+  mvaddstr(0,0, "I choose a number made of 4 digits (from 1 to 9) without repetitions\n"
+                "You enter a number of 4 digits, and I say you how many of them are\n"
+                "in my secret number but in wrong position (cows or O), and how many\n"
+                "are in the right position (bulls or X)");
+  do {
+    move(20,0); clrtoeol(); move(21, 0); clrtoeol();
+    srand(time(NULL));
+    choose_the_number();
+    do {
+      ask_for_a_number();
+      bingo = take_it_or_not();
+      tries++;
+    } while(!bingo && (tries < MAX_NUM_TRIES));
+    if ( bingo )
+      mvaddstrf(20, 0, "You guessed %s correctly in %d attempts!", number, tries);
+    else
+      mvaddstrf(20,0, "Sorry, you had only %d tries...; the number was %s",
+		MAX_NUM_TRIES, number);
+    again = ask_play_again();
+    tries = 0;
+  } while(again);
+  nocbreak(); echo(); endwin();
+  return EXIT_SUCCESS;
+}