我了解我的代码遇到的问题,但尝试其他人建议的一些事情并不能解决我的错误。
这是我的错误消息:
In file included from proj07.driver.cpp:4:
proj07.string.cpp:10: error: redefinition of 'String::String()'
/user/cse232/Projects/project07.string.h:25: error: 'String::String()' previously defined here
proj07.string.cpp: In constructor 'String::String(const char*)':
proj07.string.cpp:19: error: expected primary-expression before 'char'
proj07.string.cpp:19: error: expected `;' before 'char'
make: *** [proj07.driver.o] Error 1
这是我担心的一个:
proj07.string.cpp:10: error: redefinition of 'String::String()'
/user/cse232/Projects/project07.string.h:25: error: 'String::String()' previously defined here
我知道我应该定义一次接口文件,但我不确定要更改什么,因为我尝试的一切都会带来更多问题。
我的驱动程序(proj07.driver.cpp):
using namespace std;
#include <iostream>
#include "proj07.string.cpp"
int main()
{
const char string1[] = {'a', 'b', 'c', 'd', 'e', 'f'};
String test1();
String test2(string1);
}
我的支持文件(proj07.support.cpp):
/* Implementation file for type "String" */
using namespace std;
#include <iostream>
#include "/user/cse232/Projects/project07.string.h"
/*Default constructor*/
String::String()
{
Capacity = 0;
Length = 0;
Mem = NULL;
}
String::String( const char[] )
{
cout << char.length[]; //Function not implemented yet
}
我的生成文件:
#
# Project 07
#
proj07.exe: proj07.driver.o proj07.string.o
g++ -o proj07.exe proj.driver. proj07.string.o
proj07.driver.o: proj07.driver.cpp ~cse232/Projects/project07.string.h
g++ -Wall -c proj07.driver.cpp
proj07.string.o: proj07.string.cpp ~cse232/Projects/project07.string.h
g++ -Wall -c proj07.string.cpp
clean:
rm -f proj07.*.o proj07.exe
还有头文件——这个包含了很多我还没有做的类函数。它是不可改变的。
/******************************************************************************
Project #7 -- Interface file for type "String"
******************************************************************************/
#ifndef STRING_
#define STRING_
using namespace std;
#include <iostream>
class String
{
private:
unsigned Capacity; // Number of memory locations reserved
unsigned Length; // Number of memory locations in use
char * Mem; // Pointer to memory to hold characters
public:
// Construct empty string
//
String()
{
Capacity = 0;
Length = 0;
Mem = NULL;
}
// Reset string to empty
//
void reset() { Length = 0; }
// Return string capacity and length
//
unsigned capacity() const { return Capacity; }
unsigned length() const { return Length; }
// Return string status
//
bool empty() const { return Length == 0; }
// Return reference to element I
//
char& operator[]( unsigned I ) { return Mem[I]; }
// Return constant reference to element I
//
const char& operator[]( unsigned I ) const { return Mem[I]; }
// Destroy string
//
~String();
// Construct string by copying existing string
//
String( const String& );
// Construct string by copying C-style character string
//
String( const char[] );
// Copy string into the current string
//
String& operator=( const String& );
// Append string to the current string
//
String& operator+=( const String& );
};
// Return string which is the concatenation of two strings
//
String operator+( const String&, const String& );
// Compare two strings (equality and relational operators)
//
bool operator==( const String&, const String& );
bool operator< ( const String&, const String& );
// Output string to stream
//
ostream& operator<<( ostream&, const String& );
// Input string from stream
//
istream& operator>>( istream&, String& );
#endif
我知道这个问题与我的#include 语句有关,但我对要更改哪些语句感到困惑。如果有人能告诉我我做错了什么,我将不胜感激。谢谢!