我正在为大学写这个课程并且一直有问题。我写了在ubuntu中使用代码块，它运行良好没有错误或任何东西。但是当我在Windows上运行它在代码块上它崩溃并且我一直得到同样的错误＆＃34;在抛出一个＆＃39; std :: bad_alloc＆＃39;的实例后终止被调用。什么＆lt;＆gt;：std :: badalloc＆＃39;然后它停止工作。 任何帮助，将不胜感激！ 谢谢 罗恩
的main.cpp
#include <iostream>
#include "set.h"
using namespace std;
int main()
{
Set Set1;
List List1;
List1.header();
int choice = 0;
int value = 0;
cout<<"Press 1 to use a list or press 2 for a set"<<endl;
cin>>choice;
if(choice == 1) //List
{
while(choice != 4)
{
value = 0;
List1.menu();
cin>>choice;
switch(choice)
{
case 1:cout<<"Please enter value"<<endl;
cin>>value;
List1.set_value(value);
break;
case 2:List1.print_list();
break;
case 3:List1.test_copy_constructor();
break;
}
}
}
else if(choice == 2) //Set
{
while(choice != 4)
{
value = 0;
List1.menu();
cin>>choice;
switch(choice)
{
case 1:cout<<"Please enter value"<<endl;
cin>>value;
Set1.set_value(value);
break;
case 2:Set1.print_list();
break;
case 3:Set1.test_copy_constructor();
break;
}
}
}
else
{
cout<<"Please Enter a valid option"<<endl;
}
return 0;
}
set.cpp
#include "set.h"
#include <iostream>
#include <string>
using namespace std;
//Constructor
List::List()
{
int array_size;
int *array = new int[array_size];
// delete [] array;
}
List List1;
//Print functions
void List::header(void) const
{
cout<<"Program Name: Program 2"<<endl;
cout<<"Program Created: March 20,2014"<<endl;
cout<<"Created by: Ron Miller"<<endl;
cout<<"--------------------------------"<<endl;
cout<<" "<<endl;
}
void List::menu(void) const
{
cout<<" Menu"<<endl;
cout<<"---------------------------------------------------------"<<endl;
cout<<"1. Insert (value to be inserted is entered from keyboard)"<<endl;
cout<<"2. Print List (all values, one per line)"<<endl;
cout<<"3. Test Copy Constructor (pass list by value to a function"<<endl;
cout<<" and from within the function change all values in list"<<endl;
cout<<" to 0, then call Print List before function ends)"<<endl;
cout<<"4. Quit"<<endl;
cout<<"---------------------------------------------------------"<<endl;
}
//Modification Functions
void List::set_value(const int value)
{
if (slot == 0) //If first run set array size
{
array = new int[array_size];
}
if (slot == array_size) //If array needs extended save data in temp array expand original array then copy back to original
{
cout<<"EXPAND ARRAY"<<endl;
temp_array = array;
array_size = array_size + 2;
array = new int[array_size];
array = temp_array;
}
array[slot] = value; //Set current array slot to value
slot = slot+1;
}
void List::print_list(void) const
{
int i = 0;
cout<<"---------------"<<endl;
while(i < slot)
{
cout<<array[i]<<endl;
i = i+1;
}
cout<<"---------------"<<endl;
}
void List::test_copy_constructor(void) const
{
int* test_array;
test_array = array;
int i = 0;
test_array = new int[array_size]; //Copy original array to test_Array
while(i < slot) //Set array to 0
{
test_array[i] = 0;
i = i+1;
}
i = 0;
cout<<"---------------"<<endl;
while(i < slot) //REMOVE THIS ONLY FOR TESTING PURPOSES
{
cout<<test_array[i]<<endl;
i = i+1;
}
i = 0;
cout<<"---------------"<<endl;
List::print_list(); //Print original array
}
void Set::set_value(const int value)
{
array = get_array(); //Use get functions to obtain copies of private data
temp_array = get_temp_array();
array_size = get_array_size();
temp_array_size = get_temp_array_size();
slot = get_slot();
char match;
match = Set::search_array(value);
if(match == 'y')
{
cout<<"Match"<<endl;
}
if(match == 'n')
{
if (slot == 0) //If first run set array size
{
array = new int[array_size];
}
if (slot == array_size) //If array needs extended save data in temp array expand original array then copy back to original
{
cout<<"EXPAND ARRAY"<<endl;
temp_array = array;
array_size = array_size + 2;
array = new int[array_size];
array = temp_array;
}
array[slot] = value; //Set current array slot to value
slot = slot+1;
set_array(array); //Use set values to update private data
set_temp_array(temp_array);
set_array_size(array_size);
set_temp_array_size(temp_array_size);
set_slot(slot);
}
}
char Set::search_array(int value)
{
array = get_array();
array_size = get_array_size();
slot = get_slot();
int array_value;
char match = 'n';
int i =0;
while(i < slot) //Searches array for a match if there is return y otherwise return n
{
if( array[i] == value)
{
match = 'y';
}
else
{
match = 'n';
}
i = i+1;
}
return match;
}
//Set Functions
void List::set_array(int* value)
{
array = value;
}
void List::set_array_size(int value)
{
array_size = value;
}
void List::set_temp_array(int* value)
{
temp_array = value;
}
void List::set_temp_array_size(int value)
{
temp_array_size = value;
}
void List::set_slot(int value)
{
slot = value;
}
//Get Functions
int* List::get_array(void) const
{
return array;
}
int* List::get_temp_array(void) const
{
return temp_array;
}
int List::get_array_size(void) const
{
return array_size;
}
int List::get_temp_array_size(void) const
{
return temp_array_size;
}
int List::get_slot(void) const
{
return slot;
}
set.h
#ifndef set_H_INCLUDED
#define set_H_INCLUDED
class List
{
public:
//Constructor
List();
//Print Functions
void header (void) const;
void menu (void) const;
//Modification Functions
void set_value (const int);
void print_list(void) const;
void test_copy_constructor(void) const;
//Set functions
void set_array( int*);
void set_temp_array(int*);
void set_array_size( int);
void set_temp_array_size(int);
void set_slot(const int);
//Get functions
int* get_array (void) const;
int* get_temp_array (void) const;
int get_array_size (void) const;
int get_temp_array_size (void) const;
int get_slot(void) const;
private:
int array_size;
int *array;
int *temp_array;
int temp_array_size;
int slot = 0;
};
class Set : public List
{
public:
//Modification Functions
void set_value (const int);
char search_array(const int);
private:
int array_size = 2;
int *array;
int *temp_array;
int temp_array_size = 2;
int slot = 0;
};
#endif
答案 0 :(得分：8)
List::List()
{
int array_size;
int *array = new int[array_size];
// ...
}
array_size应该有什么价值？应该分配int数组的大小？
在我看来，这个局部变量声明是多余的;删除它，并使用成员变量。 （您已经在声明时将成员变量初始化为2，使用新的C ++ 11功能，允许您使用非static const的变量执行此操作。）
完成后，不要忘记回拨分配的内存。一般来说，我建议您使用std::vector。