我在 Eclipse 中编写一个 C++ 应用程序,在编写一些代码时,我在 ch_type.cpp 的第 18、27、41 和 81 行发现了几个错误。这是我项目的当前代码:
ch_type.h
/********************************************************
* char_type -- Character type class *
* *
* Member functions: *
* type -- returns the type of a character *
* (Limited to simple types) *
* is(ch, char_type) -- check to see if ch is *
* a member of the given type. *
* (Works for derrived types as well.) *
*******************************************************/
class char_type {
public:
enum CHAR_TYPE {
C_EOF, // End of file character
C_WHITE, // Whitespace or control character
C_NEWLINE, // A Newline character
C_ALPHA, // A Letter (includes _)
C_DIGIT, // A number
C_OPERATOR, // Random operator
C_SLASH, // The character '/'
C_L_PAREN, // The character '('
C_R_PAREN, // The character ')'
C_L_CURLY, // The character '{'
C_R_CURLY, // The character '}'
C_SINGLE, // The character '\''
C_DOUBLE, // The character '"'
// End of simple types, more complex, derrived types follow
C_HEX_DIGIT, // Hexidecimal digit
C_ALPHA_NUMERIC // Alpha numeric
};
private:
static enum CHAR_TYPE type_info[256]; // information of each character
// Fill in a range of type info stuff
void fill_range(int start, int end, CHAR_TYPE type);
public:
char_type(); // Initialize the data
//~char_type -- default destructor
// Returns true if character is a given type
int is(int ch, CHAR_TYPE kind);
CHAR_TYPE type(int ch);
}
ch_type.cpp
/********************************************************
* ch-type package *
* *
* The class ch_type is used to tell the type of *
* various characters *
* *
* The main number functions are: *
* is -- True if the character is the indicated *
* type. *
* type -- Return type of character. *
*******************************************************/
#include <iostream>
#include <assert.h>
#include "ch_type.h"
// Define the type information array
char_type::CHAR_TYPE char_type::type_info[256];
/********************************************************
* fill_range -- fill in a range of types for the *
* character type class *
* *
* Parameters *
* start, end -- range of items to fill in *
* type -- type to use for filling *
*******************************************************/
void char_type::fill_range(int start, int end, CHAR_TYPE type)
{
int cur_ch;
for (cur_ch = start; cur_ch <= end; ++cur_ch) {
assert(cur_ch >= 0);
assert(cur_ch < sizeof(type_info)/sizeof(type_info[0]));
type_info[cur_ch] = type;
}
}
/*********************************************************
* char_type::char_type -- initialize the char type table*
********************************************************/
char_type::char_type()
{
fill_range(0, 255, C_WHITE);
fill_range('A', 'Z', C_ALPHA);
fill_range('a', 'z', C_ALPHA);
type_info['_'] = C_ALPHA;
type_info['!'] = C_OPERATOR;
type_info['#'] = C_OPERATOR;
type_info['$'] = C_OPERATOR;
type_info['%'] = C_OPERATOR;
type_info['^'] = C_OPERATOR;
type_info['&'] = C_OPERATOR;
type_info['*'] = C_OPERATOR;
type_info['-'] = C_OPERATOR;
type_info['+'] = C_OPERATOR;
type_info['='] = C_OPERATOR;
type_info['|'] = C_OPERATOR;
type_info['~'] = C_OPERATOR;
type_info[','] = C_OPERATOR;
type_info[':'] = C_OPERATOR;
type_info['?'] = C_OPERATOR;
type_info['.'] = C_OPERATOR;
type_info['<'] = C_OPERATOR;
type_info['>'] = C_OPERATOR;
type_info['/'] = C_SLASH;
type_info['\n'] = C_NEWLINE;
type_info['('] = C_L_PAREN;
type_info[')'] = C_R_PAREN;
type_info['{'] = C_L_CURLY;
type_info['}'] = C_R_CURLY;
type_info['"'] = C_DOUBLE;
type_info['\''] = C_SINGLE;
}
int char_type::is(int ch, CHAR_TYPE kind)
{
if (ch == EOF) return (kind == C_EOF);
switch (kind) {
case C_HEX_DIGIT:
assert(ch >= 0);
assert(ch < sizeof(type_info)/sizeof(type_info[0]));
if (type_info[ch] == C_DIGIT)
return (1);
if ((ch >= 'A') && (ch <= 'F'))
return (1);
if ((ch >= 'a') && (ch <= 'f'))
return (1);
return (0);
case C_ALPHA_NUMERIC:
assert(ch >= 0);
assert(ch < sizeof(type_info)/sizeof(type_info[0]));
return ((type_info[ch] == C_ALPHA) ||
(type_info[ch] == C_DIGIT));
default:
assert(ch >= 0);
assert(ch < sizeof(type_info)/sizeof(type_info[0]));
return (type_info[ch] == kind);
}
};
我做错了什么?我该如何修复这些错误?
这是我的错误信息:
说明 资源路径 位置 类型
未找到成员声明 ch_type.cpp /stats 第 18 行语义错误