使用类中的主要程序中的错误
Errors within Main program using classes
我在主程序中只有相同类型的几个错误。我的大学教授没有回答我的电子邮件,所以我必须求助于问你们。在我的主要程序中,我有几个错误与此相似的错误:"对非类型类型的成员请求。"program01基本上正在测试listType.h,olisttype.h和ulisttype.h中的每个功能,以确保一切正常。您可以及时提供的任何帮助将不胜感激。
这是ListType.h:
#ifndef LISTTYPE_H_INCLUDED
#define LISTTYPE_H_INCLUDED
#include <iostream>
class ListType {
public:
ListType(size_t=10);
ListType(const ListType&);
virtual ~ListType();
virtual bool insert(int)=0;
virtual bool eraseAll();
virtual bool erase(int)=0;
virtual bool find(int) const=0;
size_t size() const;
bool empty() const;
bool full() const;
friend std::ostream& operator << (std::ostream&, const ListType&);
const ListType& operator= (const ListType&);
protected:
int *items;
size_t capacity;
size_t count;
};
#endif // LISTTYPE_H_INCLUDED
这是ListType.cpp:
#include "ListType.h"
ListType::ListType (size_t a) {
capacity = a;
count = 0;
items = new int [capacity];
}
ListType::ListType(const ListType& newlist) {
capacity = newlist.capacity;
count = newlist.count;
items = new int [capacity];
for (size_t i = 0; i < count; ++i)
items[i] = newlist.items[i];
}
ListType::~ListType() {
delete [] items;
}
bool ListType::eraseAll() {
count = 0;
return 0;
}
size_t ListType::size() const {
return (count);
}
bool ListType::empty() const {
return (count == 0);
}
bool ListType::full() const {
return (count == capacity);
}
std::ostream& operator << (std::ostream& out, const ListType& my_list) {
if (!my_list.empty()) {
for (size_t i = 0; i < my_list.count; ++i){
out << my_list.items[i] << ',';
}
}
return out;
}
const ListType& ListType::operator= (const ListType& rightObject) {
if (this != & rightObject) {
delete [] items;
capacity = rightObject.capacity;
count = rightObject.count;
items = new int[capacity];
for (size_t i = 0; i < count; ++i) {
items[i] = rightObject.items[i];
}
}
return *this;
}
这是ulisttype.h:
#ifndef ULISTTYPE_H_INCLUDED
#define ULISTTYPE_H_INCLUDED
#include <iostream>
class UListType: public ListType {
public:
UListType(size_t=10);
bool insert(int);
bool erase(int);
bool find(int) const;
};
#endif // ULISTTYPE_H_INCLUDED
这是ulisttype.cpp:
#include "ListType.h"
#include "UListType.h"
UListType::UListType (size_t c): ListType(c) {}
bool UListType::insert(int item) {
if (full()) {
int *newitems;
capacity *=2;
newitems = new int[capacity];
for (size_t i =0; i < count; ++i){
newitems[i] = items[i];
}
delete [] items;
items = newitems;
}
items[count++] = item;
return true;
}
bool UListType::erase(int item) {
bool result = false;
size_t i=0;
while ( i < count && items [i] != item) {
++i;
}
if (i < count) {
items[i] = items[-- count];
result = true;
}
return result;
}
bool UListType::find(int item) const {
size_t i = 0;
while (i < count && items [i] != item) {
++i;
}
return i < count;
}
这是olisttype.h:
#ifndef OLISTTYPE_H_INCLUDED
#define OLISTTYPE_H_INCLUDED
#include <iostream>
class OListType: public ListType {
public:
OListType(size_t=10);
bool insert(int);
bool erase(int);
bool find(int) const;
};
#endif // OLISTTYPE_H_INCLUDED
这是olisttype.cpp:
#include "ListType.h"
#include "OListType.h"
OListType::OListType(size_t c): ListType(c) {}
bool OListType::insert(int item) {
size_t i = count;
if (full()) {
int *newitems;
capacity *=2;
newitems = new int[capacity];
for(size_t j=0; j < count; ++j) {
newitems[j] = items[i];
}
delete [] items;
items = newitems;
}
while (i > 0 && items[i-1] > item){
items[count++] = item;
}
return true;
}
bool OListType::erase(int item) {
bool found=false;
size_t i=0, j= count-1, mid;
while (i <= j && !(found)){
mid = (i + j)/2;
if (item < items [mid])
j = mid - 1;
else if (item > items [mid])
i = mid + 1;
found = items [mid] == item;
}
if (found) {
for (i = mid; i < count - 1; ++i) {
items [i] = items [i +1];
}
--count;
}
return found;
}
bool OListType::find (int item) const {
bool found=false;
size_t i=0, j= count-1, mid;
while (i <= j && !(found)){
mid = (i + j)/2;
if (item < items [mid])
j = mid - 1;
else if (item > items [mid])
i = mid + 1;
found = items [mid] == item;
}
return found;
}
这是program01.cpp:
#include "ListType.h"
#include "UListType.h"
#include "OListType.h"
#include <iostream>
using namespace std;
int main() {
OListType list[5] = {165, 16, 118, 212, 104};
UListType ranlist[10] = {243, 300, 154, 153, 592, 124, 195, 217, 289, 405};
UListType UListAssignmentTest;
OListType OListAssignmentTest;
cout << "The Ordered List before operations:" << endl;
cout << list << endl << endl;
if(list.empty()) **<-- HERE BE THE ERROR**
cout << "The list is empty, therefore it is true.";
else
cout << "The list is full or partially full, therefore it is false";
cout << endl << endl;
if(list.full())
cout << "The list is full, therefore it is true.";
else
cout << "The list is partially full or empty, therefore it is false";
cout << endl << endl;
list.insert(25);
cout << endl << endl;
cout << "The Ordered list after Insert:" << endl;
cout << list << endl << endl;
list.find(25);
cout << endl << endl;
list.find(30);
cout << endl << endl;
list.erase(25);
cout << endl << endl;
cout << "The Ordered List after Erase:" << endl;
cout << list << endl << endl;
cout << "The Unordered List before operations:" << endl;
cout << ranlist << endl << endl;
if(ranlist.empty())
cout << "The list is empty, therefore it is true.";
else
cout << "The list is full or partially full, therefore it is false";
cout << endl << endl;
if(ranlist.full())
cout << "The list is full, therefore it is true.";
else
cout << "The list is partially full or empty, therefore it is false";
cout << endl << endl;
ranlist.insert(25);
cout << endl << endl;
cout << "The Unordered List after Insert:" << endl;
cout << ranlist << endl << endl;
ranlist.find(25);
cout << endl << endl;
ranlist.find(30);
cout << endl << endl;
ranlist.erase(25);
cout << endl << endl;
cout << "The Unordered List after Erase:" << endl;
cout << ranlist << endl << endl;
cout << "Testing Ordered List Assignment Operator" << endl;
OListAssignmentTest = list;
cout << OListAssignmentTest << endl << endl;
cout << "Testing Unordered List Assignment Operator" << endl;
UListAssignmentTest = ranlist;
cout << UListAssignmentTest << endl << endl
cout << "Testing Ordered List Copy Constructor" << endl;
OListType OListVariable = list;
cout << OListVariable << endl << endl;
cout << "Testing Unordered List Copy Constructor" << endl;
UListType UListVariable = ranlist;
cout << UListVariable << endl << endl;
cout << "Testing Erase All for OList" << endl;
list.eraseAll();
cout << "OList values now: " << list.empty() << endl << endl;
cout << "Testing Erase All for UList" << endl;
ranlist.eraseAll();
cout << endl << "UList values now: " << ranlist.empty() << endl;
return 0;
}
OListType list[5] = {165, 16, 118, 212, 104};
此行声明了5种olisttype类型的数组。这似乎不正确。
您想声明一个olisttype并将5个值插入其中。如果没有,请澄清该线应表示什么。
这可能是您应该做的:
OListType list;
list.insert(165);
list.insert(16); // etc...
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