/*
expr --> ( expr ) | expr op expr | number | expr expr | x
x --> [:alpha:][:word:]*
op --> + | - | * | /
number --> integer
integer --> integer digit | digit
digit --> 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9
built-in function: pow (pow a b = a^b), sin
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <ctype.h>
#define SUCC 0
#define FAIL 1
#define YES 0
#define NO 1
#define EMPTY -1
#define STACK_LIMIT 80
struct ENV;
union data;
struct function {
void (*code)(struct ENV*, union data);
struct ENV* env;
};
typedef union data { char op; double value; struct function fun; } DATA;
typedef struct stack {
int type; /* 0: operator, 1: data, 2: function */
DATA data;
int priority; } STACK_DATA;
struct stack STACK[STACK_LIMIT];
int STACK_TOP = EMPTY;
char expr[80];
int i = 0;
void push( STACK_DATA data )
{
if ( STACK_TOP < STACK_LIMIT - 1 )
STACK[++STACK_TOP] = data;
else
{
printf( "\nStack Overflow!!\n" );
exit( 1 );
}
}
STACK_DATA pop( void )
{
if ( STACK_TOP != EMPTY )
return( STACK[STACK_TOP--] );
else
{
printf( "\nStack Underflow!!\n" );
exit( 1 );
}
}
struct ENV {
char var[16];
int type;
DATA value;
struct ENV *next;
};
struct ENV *top_env, env_mem[100];
int env_num;
struct ENV* alloc_env(void) {
if (env_num == 100) {
printf("not enough memory\n");
exit(1);
}
struct ENV* env = env_mem+env_num;
++env_num;
return env;
}
struct ENV* lookup_assume_exists(struct ENV* curr, const char* var) {
while (curr) {
if (strcmp(var, curr->var) == 0)
return curr;
curr = curr->next;
}
printf("Unbound variable %s\n", var);
exit(1);
}
void variable(void) {
char var[16];
int k = 0;
while (expr[i] && isalnum(expr[i])) {
var[k] = expr[i];
++i;
++k;
}
var[k] = 0;
struct ENV* entry = lookup_assume_exists(top_env, var);
STACK_DATA data;
data.type = entry->type;
data.data = entry->value;
data.priority = 0;
push(data);
}
void apply() {
DATA arg = pop().data;
struct function f = pop().data.fun;
f.code(f.env, arg);
}
void push_sin(struct ENV* env_unused, DATA arg) {
STACK_DATA data;
data.type = 1;
data.data.value = sin(arg.value);
data.priority = 0;
push(data);
}
void push_pow_has_base(struct ENV* env, DATA arg) {
STACK_DATA data;
data.type = 1;
data.data.value = pow(lookup_assume_exists(env, "base")->value.value, arg.value);
data.priority = 0;
push(data);
}
void push_pow(struct ENV* env, DATA arg) {
struct ENV *cl = alloc_env();
strcpy(cl->var, "base");
cl->type = 1;
cl->value.value = arg.value;
cl->next = env;
STACK_DATA data;
data.type = 2;
data.data.fun.code = push_pow_has_base;
data.data.fun.env = cl;
data.priority = 0;
push(data);
}
int number( void )
{
STACK_DATA data;
int k = 0, mantissa = NO;
char value[80];
while ( expr[i] >= '0' && expr[i] <= '9' ) /* integer */
{
mantissa = YES;
value[k++] = expr[i++];
}
value[k] = '\0';
data.type = 1;
data.data.value = atof( value );
data.priority = 0;
push( data );
return( SUCC );
}
int evaluate( void )
{
STACK_DATA data, data1, data2, opcode;
if ( STACK_TOP == EMPTY )
return( FAIL );
data1 = pop();
if ( data1.type != 1 )
return( FAIL ); /* not an operand */
if ( STACK_TOP == EMPTY )
return( FAIL );
opcode = pop();
if ( opcode.type != 0 )
return( FAIL ); /* not an operator */
if ( STACK_TOP == EMPTY )
return( FAIL );
data2 = pop();
if ( data2.type != 1 )
return( FAIL ); /* not an operand */
switch( opcode.data.op )
{
case '+' : data.data.value = data2.data.value + data1.data.value;
break;
case '-' : data.data.value = data2.data.value - data1.data.value;
break;
case '*' : data.data.value = data2.data.value * data1.data.value;
break;
case '/' : data.data.value = data2.data.value / data1.data.value;
break;
default: return( FAIL );
break;
}
data.type = 1;
data.priority = 0;
push( data );
return( SUCC );
}
int right_parenthesis( void )
{
STACK_DATA data;
while ( STACK_TOP != EMPTY )
{
if ( STACK_TOP-1 != EMPTY && STACK[STACK_TOP-1].data.op == '(' )
{
i++;
data = pop();
pop(); /* remove left parenthesis */
push( data );
return( SUCC );
}
else if ( evaluate() == FAIL )
return( FAIL );
}
return( FAIL );
}
int parenthesis( void )
{
STACK_DATA data;
data.type = 0;
data.data.op = expr[i++];
data.priority = 0; /* left_parenthesis */
push( data );
return( SUCC );
}
int op( void )
{
STACK_DATA data;
switch ( expr[i] )
{
case '+' :
case '-' : data.priority = 1;
break;
case '*' :
case '/' : data.priority = 2;
break;
default :
return( FAIL );
}
while ( STACK_TOP > 0 && data.priority <= STACK[STACK_TOP-1].priority )
{
if ( evaluate() == FAIL )
return( FAIL );
}
data.type = 0;
data.data.op = expr[i++];
push( data );
return( SUCC );
}
int expression( void )
{
while ( expr[i] == ' ' ) /* skip the leading spaces */
i++;
if ( expr[i] == '(' )
return( parenthesis() ); /* ( expr) */
if ( expr[i] == '+' || expr[i] == '-' || expr[i] == '*' || expr[i] == '/' )
return( op() ); /* expr op expr */
if ( expr[i] >= '0' && expr[i] <= '9' )
return( number() ); /* number */
if ( expr[i] == ')') /* end of parenthesis */
return( right_parenthesis() );
if (isalpha(expr[i])) {
variable();
return SUCC;
}
if ( expr[i] == '\0') /* end of expression */
return( SUCC );
else
return( FAIL );
}
int result( void )
{
while ( STACK_TOP > 0 )
{
if ( evaluate() == FAIL )
return( FAIL );
}
return( SUCC );
}
void calculate( void )
{
STACK_DATA data;
while ( expr[i] != '\0' )
{
if ( expression() == FAIL ) /* parse the exspression */
break;
if (STACK_TOP >= 1 && STACK[STACK_TOP-1].type == 2 && (STACK[STACK_TOP].type == 1 || STACK[STACK_TOP].type == 2))
apply();
}
if ( expr[i] == '\0' ) /* end of expression */
{
if ( result() == SUCC && STACK_TOP == 0 )
{
data = pop();
if ( data.type == 1 )
printf( "The result is %g\n", data.data.value );
else
printf( "Error : Illegal expression\n" );
}
else
printf( "Error : Illegal expression\n" );
}
else
printf( "Error : Illegal expression\n" );
}
void init( void )
{
STACK_TOP = EMPTY; /* clear stack */
i = 0;
env_num = 0;
top_env = NULL;
struct ENV* env_sin = alloc_env();
strcpy(env_sin->var, "sin");
env_sin->type = 2;
env_sin->value.fun.code = push_sin;
env_sin->next = NULL;
struct ENV* env_pow = alloc_env();
strcpy(env_pow->var, "pow");
env_pow->type = 2;
env_pow->value.fun.code = push_pow;
env_pow->next = env_sin;
top_env = env_pow;
env_sin->value.fun.env = top_env;
env_pow->value.fun.env = top_env;
}
int main( void )
{
char ch;
do
{
init(); /* initialize */
printf( "Please keyin expression to be evaluated \n" );
gets( expr );
calculate();
printf( "Continue (y/n) ? " );
ch = getchar();
} while( !( ch == 'n' || ch == 'N' ) );
return( 0 );
}
/*
	expr --> ( expr ) | expr op expr | number | expr expr | x
  x --> [:alpha:][:word:]*
	op --> + | - | * | /
	number --> integer
	integer --> integer digit | digit
	digit --> 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9

  built-in function: pow (pow a b = a^b), sin
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <ctype.h>

#define SUCC 0
#define FAIL 1
#define YES 0
#define NO 1
#define EMPTY -1
#define STACK_LIMIT 80

struct ENV;
union data;
struct function {
  void (*code)(struct ENV*, union data);
  struct ENV* env;
};

typedef union data { char op; double value; struct function fun; } DATA;

typedef struct stack {
	int type;								/* 0: operator, 1: data, 2: function */
	DATA data;
	int priority; } STACK_DATA;

struct stack STACK[STACK_LIMIT];
int STACK_TOP = EMPTY;

char expr[80];
int i = 0;

void push( STACK_DATA data )

{
  if ( STACK_TOP < STACK_LIMIT - 1 )
    STACK[++STACK_TOP] = data;
  else
  {
    printf( "\nStack Overflow!!\n" );
    exit( 1 );
  }
}

STACK_DATA pop( void )

{
  if ( STACK_TOP != EMPTY )
    return( STACK[STACK_TOP--] );
  else
  {
    printf( "\nStack Underflow!!\n" );
    exit( 1 );
  }
}






struct ENV {
  char var[16];
  int type;
  DATA value;
  struct ENV *next;
};

struct ENV *top_env, env_mem[100];
int env_num;
struct ENV* alloc_env(void) {
  if (env_num == 100) {
    printf("not enough memory\n");
    exit(1);
  }
  struct ENV* env = env_mem+env_num;
  ++env_num;
  return env;
}

struct ENV* lookup_assume_exists(struct ENV* curr, const char* var) {
  while (curr) {
    if (strcmp(var, curr->var) == 0)
      return curr;
    curr = curr->next;
  }
  printf("Unbound variable %s\n", var);
  exit(1);
}

void variable(void) {
  char var[16];
  int k = 0;
  while (expr[i] && isalnum(expr[i])) {
    var[k] = expr[i];
    ++i;
    ++k;
  }
  var[k] = 0;

  struct ENV* entry = lookup_assume_exists(top_env, var);
  STACK_DATA data;
  data.type = entry->type;
  data.data = entry->value;
  data.priority = 0;
  push(data);
}

void apply() {
  DATA arg = pop().data;
  struct function f = pop().data.fun;
  f.code(f.env, arg);
}

void push_sin(struct ENV* env_unused, DATA arg) {
  STACK_DATA data;
  data.type = 1;
  data.data.value = sin(arg.value);
  data.priority = 0;
  push(data);
}

void push_pow_has_base(struct ENV* env, DATA arg) {
  STACK_DATA data;
  data.type = 1;
  data.data.value = pow(lookup_assume_exists(env, "base")->value.value, arg.value);
  data.priority = 0;
  push(data);
}

void push_pow(struct ENV* env, DATA arg) {
  struct ENV *cl = alloc_env();
  strcpy(cl->var, "base");
  cl->type = 1;
  cl->value.value = arg.value;
  cl->next = env;

  STACK_DATA data;
  data.type = 2;
  data.data.fun.code = push_pow_has_base;
  data.data.fun.env = cl;
  data.priority = 0;
  push(data);
}








int number( void )

{
	STACK_DATA data;
	int k = 0, mantissa = NO;
	char value[80];

	while ( expr[i] >= '0' && expr[i] <= '9' )		/* integer */
	{
		mantissa = YES;
		value[k++] = expr[i++];
	}

	value[k] = '\0';

	data.type = 1;
	data.data.value = atof( value );
	data.priority = 0;
	push( data );

	return( SUCC );
}

int evaluate( void )

{
	STACK_DATA data, data1, data2, opcode;

	if ( STACK_TOP == EMPTY )
		return( FAIL );
	data1 = pop();
	if ( data1.type != 1 )
		return( FAIL );				/* not an operand */

	if ( STACK_TOP == EMPTY )
		return( FAIL );
	opcode = pop();
	if ( opcode.type != 0 )
		return( FAIL );				/* not an operator */

	if ( STACK_TOP == EMPTY )
		return( FAIL );
	data2 = pop();
	if ( data2.type != 1 )
		return( FAIL );				/* not an operand */

	switch( opcode.data.op )
	{
		case '+' : data.data.value = data2.data.value + data1.data.value;
			break;
		case '-' : data.data.value = data2.data.value - data1.data.value;
			break;
		case '*' : data.data.value = data2.data.value * data1.data.value;
			break;
		case '/' : data.data.value = data2.data.value / data1.data.value;
			break;
		default: return( FAIL );
			break;
	}

	data.type = 1;
	data.priority = 0;
	push( data );

	return( SUCC );
}

int right_parenthesis( void )

{
	STACK_DATA data;

	while ( STACK_TOP != EMPTY )
	{
		if ( STACK_TOP-1 != EMPTY && STACK[STACK_TOP-1].data.op == '(' )
		{
			i++;
			data = pop();
			pop();								/* remove left parenthesis */
			push( data );
			return( SUCC );
		}
		else if ( evaluate() == FAIL )
			return( FAIL );
	}

	return( FAIL );
}

int parenthesis( void )
{
	STACK_DATA data;

	data.type = 0;
	data.data.op = expr[i++];
	data.priority = 0;						/* left_parenthesis */
	push( data );

	return( SUCC );
}

int op( void )
{
	STACK_DATA data;

	switch ( expr[i] )
	{
		case '+' :
		case '-' : data.priority = 1;
			break;
		case '*' :
		case '/' : data.priority = 2;
			break;
		default :
			return( FAIL );
	}

	while ( STACK_TOP > 0 && data.priority <= STACK[STACK_TOP-1].priority )
	{
		if ( evaluate() == FAIL )
			return( FAIL );
	}

	data.type = 0;
	data.data.op = expr[i++];
	push( data );

	return( SUCC );
}

int expression( void )
{
	while ( expr[i] == ' ' )				/* skip the leading spaces */
		i++;

  if ( expr[i] == '(' )
 		return( parenthesis() );			/* ( expr) */

  if ( expr[i] == '+' || expr[i] == '-' || expr[i] == '*' || expr[i] == '/' )
		return( op() );						/* expr op expr */

	if ( expr[i] >= '0' && expr[i] <= '9'	)
		return( number() );					/* number */

	if ( expr[i] == ')')					/* end of parenthesis */
		return( right_parenthesis() );

  if (isalpha(expr[i])) {
    variable();
    return SUCC;
  }

	if ( expr[i] == '\0')					/* end of expression */
		return( SUCC );
	else
		return( FAIL );
}

int result( void )

{
	while ( STACK_TOP > 0 )
	{
		if ( evaluate() == FAIL )
			return( FAIL );
	}

	return( SUCC );
}

void calculate( void )
{
	STACK_DATA data;

	while ( expr[i] != '\0' )
	{
		if ( expression() == FAIL )		/* parse the exspression */
			break;
    if (STACK_TOP >= 1 && STACK[STACK_TOP-1].type == 2 && (STACK[STACK_TOP].type == 1 || STACK[STACK_TOP].type == 2))
      apply();
	}

	if ( expr[i] == '\0' )	/* end of expression */
    {
		if ( result() == SUCC && STACK_TOP == 0 )
		{
			data = pop();
			if ( data.type == 1 )
				printf( "The result is %g\n", data.data.value );
			else
				printf( "Error : Illegal expression\n" );
 		}
		else
			printf( "Error : Illegal expression\n" );
    }
	else
		printf( "Error : Illegal expression\n" );
}

void init( void )
{
	STACK_TOP = EMPTY;   /* clear stack */
	i = 0;





  env_num = 0;

  top_env = NULL;
  struct ENV* env_sin = alloc_env();
  strcpy(env_sin->var, "sin");
  env_sin->type = 2;
  env_sin->value.fun.code = push_sin;
  env_sin->next = NULL;

  struct ENV* env_pow = alloc_env();
  strcpy(env_pow->var, "pow");
  env_pow->type = 2;
  env_pow->value.fun.code = push_pow;
  env_pow->next = env_sin;

  top_env = env_pow;
  env_sin->value.fun.env = top_env;
  env_pow->value.fun.env = top_env;
}

int main( void )
{
	char ch;

	do
	{
		init();				/* initialize */

		printf( "Please keyin expression to be evaluated \n" );
		gets( expr );

		calculate();

		printf( "Continue (y/n) ? " );
		ch = getchar();
	} while( !( ch == 'n' || ch == 'N' ) );

	return( 0 );
}

Main.java:11: error: illegal character: '#'
#include <stdio.h>
^
Main.java:11: error: class, interface, or enum expected
#include <stdio.h>
^
Main.java:12: error: illegal character: '#'
#include <stdlib.h>
^
Main.java:13: error: illegal character: '#'
#include <string.h>
^
Main.java:14: error: illegal character: '#'
#include <math.h>
^
Main.java:15: error: illegal character: '#'
#include <ctype.h>
^
Main.java:17: error: illegal character: '#'
#define SUCC 0
^
Main.java:18: error: illegal character: '#'
#define FAIL 1
^
Main.java:19: error: illegal character: '#'
#define YES 0
^
Main.java:20: error: illegal character: '#'
#define NO 1
^
Main.java:21: error: illegal character: '#'
#define EMPTY -1
^
Main.java:22: error: illegal character: '#'
#define STACK_LIMIT 80
^
Main.java:25: error: class, interface, or enum expected
union data;
^
Main.java:26: error: class, interface, or enum expected
struct function {
^
Main.java:28: error: class, interface, or enum expected
struct ENV* env;
^
Main.java:29: error: class, interface, or enum expected
};
^
Main.java:31: error: class, interface, or enum expected
typedef union data { char op; double value; struct function fun; } DATA;
^
Main.java:31: error: class, interface, or enum expected
typedef union data { char op; double value; struct function fun; } DATA;
^
Main.java:31: error: class, interface, or enum expected
typedef union data { char op; double value; struct function fun; } DATA;
^
Main.java:31: error: class, interface, or enum expected
typedef union data { char op; double value; struct function fun; } DATA;
^
Main.java:33: error: class, interface, or enum expected
typedef struct stack {
^
Main.java:35: error: class, interface, or enum expected
DATA data;
^
Main.java:36: error: class, interface, or enum expected
int priority; } STACK_DATA;
^
Main.java:36: error: class, interface, or enum expected
int priority; } STACK_DATA;
^
Main.java:38: error: class, interface, or enum expected
struct stack STACK[STACK_LIMIT];
^
Main.java:39: error: class, interface, or enum expected
int STACK_TOP = EMPTY;
^
Main.java:41: error: class, interface, or enum expected
char expr[80];
^
Main.java:42: error: class, interface, or enum expected
int i = 0;
^
Main.java:44: error: class, interface, or enum expected
void push( STACK_DATA data )
^
Main.java:49: error: class, interface, or enum expected
else
^
Main.java:52: error: class, interface, or enum expected
exit( 1 );
^
Main.java:53: error: class, interface, or enum expected
}
^
Main.java:61: error: class, interface, or enum expected
else
^
Main.java:64: error: class, interface, or enum expected
exit( 1 );
^
Main.java:65: error: class, interface, or enum expected
}
^
Main.java:75: error: class, interface, or enum expected
int type;
^
Main.java:76: error: class, interface, or enum expected
DATA value;
^
Main.java:77: error: class, interface, or enum expected
struct ENV *next;
^
Main.java:78: error: class, interface, or enum expected
};
^
Main.java:80: error: class, interface, or enum expected
struct ENV *top_env, env_mem[100];
^
Main.java:81: error: class, interface, or enum expected
int env_num;
^
Main.java:82: error: class, interface, or enum expected
struct ENV* alloc_env(void) {
^
Main.java:85: error: class, interface, or enum expected
exit(1);
^
Main.java:86: error: class, interface, or enum expected
}
^
Main.java:88: error: class, interface, or enum expected
++env_num;
^
Main.java:89: error: class, interface, or enum expected
return env;
^
Main.java:90: error: class, interface, or enum expected
}
^
Main.java:96: error: class, interface, or enum expected
curr = curr->next;
^
Main.java:97: error: class, interface, or enum expected
}
^
Main.java:99: error: class, interface, or enum expected
exit(1);
^
Main.java:100: error: class, interface, or enum expected
}
^
Main.java:104: error: class, interface, or enum expected
int k = 0;
^
Main.java:105: error: class, interface, or enum expected
while (expr[i] && isalnum(expr[i])) {
^
Main.java:107: error: class, interface, or enum expected
++i;
^
Main.java:108: error: class, interface, or enum expected
++k;
^
Main.java:109: error: class, interface, or enum expected
}
^
Main.java:112: error: class, interface, or enum expected
struct ENV* entry = lookup_assume_exists(top_env, var);
^
Main.java:113: error: class, interface, or enum expected
STACK_DATA data;
^
Main.java:114: error: class, interface, or enum expected
data.type = entry->type;
^
Main.java:115: error: class, interface, or enum expected
data.data = entry->value;
^
Main.java:116: error: class, interface, or enum expected
data.priority = 0;
^
Main.java:117: error: class, interface, or enum expected
push(data);
^
Main.java:118: error: class, interface, or enum expected
}
^
Main.java:122: error: class, interface, or enum expected
struct function f = pop().data.fun;
^
Main.java:123: error: class, interface, or enum expected
f.code(f.env, arg);
^
Main.java:124: error: class, interface, or enum expected
}
^
Main.java:128: error: class, interface, or enum expected
data.type = 1;
^
Main.java:129: error: class, interface, or enum expected
data.data.value = sin(arg.value);
^
Main.java:130: error: class, interface, or enum expected
data.priority = 0;
^
Main.java:131: error: class, interface, or enum expected
push(data);
^
Main.java:132: error: class, interface, or enum expected
}
^
Main.java:136: error: class, interface, or enum expected
data.type = 1;
^
Main.java:137: error: class, interface, or enum expected
data.data.value = pow(lookup_assume_exists(env, "base")->value.value, arg.value);
^
Main.java:138: error: class, interface, or enum expected
data.priority = 0;
^
Main.java:139: error: class, interface, or enum expected
push(data);
^
Main.java:140: error: class, interface, or enum expected
}
^
Main.java:144: error: class, interface, or enum expected
strcpy(cl->var, "base");
^
Main.java:145: error: class, interface, or enum expected
cl->type = 1;
^
Main.java:146: error: class, interface, or enum expected
cl->value.value = arg.value;
^
Main.java:147: error: class, interface, or enum expected
cl->next = env;
^
Main.java:149: error: class, interface, or enum expected
STACK_DATA data;
^
Main.java:150: error: class, interface, or enum expected
data.type = 2;
^
Main.java:151: error: class, interface, or enum expected
data.data.fun.code = push_pow_has_base;
^
Main.java:152: error: class, interface, or enum expected
data.data.fun.env = cl;
^
Main.java:153: error: class, interface, or enum expected
data.priority = 0;
^
Main.java:154: error: class, interface, or enum expected
push(data);
^
Main.java:155: error: class, interface, or enum expected
}
^
Main.java:168: error: class, interface, or enum expected
int k = 0, mantissa = NO;
^
Main.java:169: error: class, interface, or enum expected
char value[80];
^
Main.java:171: error: class, interface, or enum expected
while ( expr[i] >= '0' && expr[i] <= '9' ) /* integer */
^
Main.java:174: error: class, interface, or enum expected
value[k++] = expr[i++];
^
Main.java:175: error: class, interface, or enum expected
}
^
Main.java:179: error: class, interface, or enum expected
data.type = 1;
^
Main.java:180: error: class, interface, or enum expected
data.data.value = atof( value );
^
Main.java:181: error: class, interface, or enum expected
data.priority = 0;
^
Main.java:182: error: class, interface, or enum expected
push( data );
^
Main.java:184: error: class, interface, or enum expected
return( SUCC );
^
Main.java:185: error: class, interface, or enum expected
}
^
Main.java:192: error: class, interface, or enum expected
if ( STACK_TOP == EMPTY )
^
Main.java:194: error: class, interface, or enum expected
data1 = pop();
^
100 errors