调试断言失败。 BIG_ALLOCATION_ALLIGNMENT
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【中文标题】调试断言失败。 BIG_ALLOCATION_ALLIGNMENT【英文标题】:Debug Assertion Failed. BIG_ALLOCATION_ALLIGNMENT 【发布时间】:2017-01-11 13:58:04 【问题描述】:我正在尝试获取用户输入的笔记并将它们存储在一个数组中。验证工作正常,但是当我输入循环中的最后一个值时,我得到:
Debug Assertion Failed!
Expression: "(_Ptr_user & (_BIG_ALLOCATION_ALIGNMENT - 1))==0"&&0
An invalid parameter was passed to a function that considers invalid parameters fatal.
我很难理解问题出在哪里以及如何解决它。
#include "stdafx.h"
#include <iostream>
#include <string>
using namespace std;
typedef string noteName;
noteName getNoteName(int i)
bool flag = true;
noteName Namein;
do
cout << "Please enter note name no. " << i + 1 << ": ";
cin >> Namein;
cout << "------------------------------------\n";
if (Namein.length() > 3 || Namein.length() < 2)
cout << "Sorry, a note name must be 2 or 3 characters long. Please try again.\n";
flag = false;
else if (Namein.length() == 3 && Namein[1] != '#')
cout << "Sorry, the second character of a sharp note name must be #. Please try again.\n";
flag = false;
else if ((Namein[0] < 'a' || Namein[0] > 'g') && (Namein[0] < 'A' || Namein[0] > 'G'))
cout << "Sorry, the first character of a note name must be a letter between A and G. Please try again.\n";
flag = false;
else if (isdigit(Namein.back()) == false)
cout << "Sorry, the last character of a note name must be a number. Please try again.\n";
flag = false;
else
flag = true;
while (flag == false);
return Namein;
int main()
const int numNotes = 4;
noteName NoteNames[numNotes];
cout << "Hello\n";
for (int i = 0; i <= numNotes; i++)
NoteNames[i] = getNoteName(i);
cout << "Thank you, the note names and lengths you entered were: \n\n";
for (int i = 0; i <= numNotes; i++)
cout << i << ". " << NoteNames[i] << "\n";
cout << "Done!";
return 0;
我想说这与 getNoteName()
具有 string
返回类型有关,因为我的任何其他返回 int
的函数都没有这个问题。
【问题讨论】:
【参考方案1】:noteName NoteNames[numNotes];
定义了一个数组,其中NoteNames[numNotes - 1]
是您可以访问的最大元素。
你比这更进一步。这样做的行为是undefined,它表现为您观察到的崩溃。
将循环限制替换为for (int i = 0; i < numNotes; i++)
或类似名称。
(您的类名和变量名的 CamelCase 约定也与正常情况不同,这会使您的代码难以阅读。)
(我也希望看到constexpr int numNotes = 4;
:谷歌了解更多详情。)
【讨论】:
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