Реферат Програма - калькулятор

double e = expr ();

if (Curr_tok! = RP) return error ("Rigth parentsis expected");

get_token ();

return e;

case END:

return 1;

default:

return number_value;

/* ===================== Обчислення значення функції ======================== */

double function_value ()

switch (function_number)

case 0:

return sin (expr ());

case 1:

return cos (expr ());

case 2:

return log (expr ());

case 3:

return asin (expr ());

case 4:

return acos (expr ());

case 5:

return E;

case 6:

return PI;

/* ======================== Висновок повідомлення про помилку ======================== */

double error (char * s)

int sx, sy;

char * empty_str, * Err_message;

err_message = (Char *) Malloc (strlen (s) +29);

strcpy (err_message, s);

strcat (err_message, ". Press any key to continue! "); p> empty_str = (Char *) Malloc (strlen (s) +29);

memset (empty_str, ' ', Strlen (s) +28),

empty_str [strlen (s) +28] = ' X0';

sx = Wherex ();

sy = Wherey ();

gotoxy (16,22);

textcolor (10);

cprintf ("% s", err_message);

sound (440);

delay (550);

nosound ();

getch ();

gotoxy (16,22);

cprintf ("% s", empty_str);

gotoxy (sx, sy);

textcolor (15);

free (err_message);

free (empty_str);

/* ============================== Вікно повідомлення ============= =============== */

void message ()

textcolor (RED);

gotoxy (15,21);

cprintf ("-");

for (int x = 16; x <70; x + +)

cprintf ("-");

cprintf ("-");

gotoxy (+15,22);

cprintf ("|");

gotoxy (70,22);

cprintf ("|"),

gotoxy (15,23);

cprintf ("-");

for (int x1 = 16; x1 <70; x1 + +)

cprintf ("-");

cprintf ("-"),

gotoxy (3,22);

cprintf ("Message:");

/* ================================== Рамка ========== ======================= */

void ramka ()

textcolor (10);

cprintf ("=");

for (int x = 2; x <80; x + +)

cprintf ("=");

cprintf ("=");

for (int y = 2; y <24; y + +)

cprintf ("| n b");

cprintf ("="),

for (int x1 = 2; x1 <80; x1 + +)

cprintf ("=");

cprintf ("=");

gotoxy (80,2);

for (int y1 = 2; y1 <24; y1 + +)

gotoxy (80, y1),

cprintf ("|");

/* ================================= Вікно введення ========== =================== */

void screen_input ()

textcolor (10);

gotoxy (5,3);

cprintf ("-");

for (int x = 6; x <76; x + +)

cprintf ("-");

cprintf ("-");

gotoxy (5,4);

cprintf ("|");

gotoxy (76,4);

cprintf ("|");

gotoxy (5,5);

cprintf ("-");

for (int x1 = 6; x1 <76; x1 + +)

cprintf ("-");

cprintf ("-");

textcolor (15),

gotoxy (35,2);

cprintf ("Input expression ");

/* ================================= Вікно виводу ========== =================== */

void screen_output ()

textcolor (10);

gotoxy (22,7);

cprintf ("-");

for (int x = 22; x <58; x + +)

cprintf ("-");

cprintf ("-");

gotoxy (22,8);

cprintf ("|");

gotoxy (59,8);

cprintf ("|");

gotoxy (22,9);

cprintf ("-");

for (int x1 = 22; x1 <58; x1 + +)

cprintf ("-");

cprintf ("-"),

textcolor (15),

gotoxy (39,6);

cprintf ("Answer");

/* ================================ Інформація ============ =================== */

void info ()

textcolor (10);

gotoxy (13,11);

cprintf ("Input expression, used + - */() ^ sin, cos, asin, acos, ln, pi, e ");

gotoxy (22,12);

cprintf ("Enter ; = Output answer Esc exit ");

/* ==================================== Меню ======== ======================== */

void menu (int n)

clrscr ();

textcolor (3); gotoxy (31,9);

cprintf ("Program calculator n ");

textcolor (15);

if (N == 1) textcolor (12); else

textcolor (15);

gotoxy (37,12);

cprintf ("Help n");

if (N == 2) textcolor (12); else

textcolor (15);

gotoxy (34,14);

cprintf ("Calculator n");

if (N == 3) textcolor (12); else

textcolor (15);

gotoxy (33,16);

cprintf ("About author...