UC知道C++ 的一个Debug 作业
来源：百度知道 编辑：UC知道 时间：2024/06/08 05:30:53
这是我课上的一个Debug作业，偶不知道为什么总是出问题………………
Description
This assignment tests your knowledge of C++ memory management, pointers, and parameter passing. The program contained in wordlist.cpp reads a list of words from a text file, and then displays the words to the console. The program, however, contains run-time errors. These errors all relate to the use of pointers, the passing of parameters, and dynamic memory management.
Your task is to correct these errors. The use of a debugger is very strongly suggested. This will save you time and give you practice using a debugger.
大概就是说，要从一个“words.txt”中读数据并输出。
用一个数组来读，如果内存空间不够要扩大它的size
就是这样了。
还有就是，应该是在39，47，48行有问题（可能还有），main函数也好像有问题。
这是需要修改的代码：
#include <iostream>
#include <fstream>
#include <string>
#include <cstdlib>
using namespace std;
const int INITIAL_LIST_CAPACITY = 10;
void build_wordlist (string* w
Description
This assignment tests your knowledge of C++ memory management, pointers, and parameter passing. The program contained in wordlist.cpp reads a list of words from a text file, and then displays the words to the console. The program, however, contains run-time errors. These errors all relate to the use of pointers, the passing of parameters, and dynamic memory management.
Your task is to correct these errors. The use of a debugger is very strongly suggested. This will save you time and give you practice using a debugger.
大概就是说，要从一个“words.txt”中读数据并输出。
用一个数组来读，如果内存空间不够要扩大它的size
就是这样了。
还有就是，应该是在39，47，48行有问题（可能还有），main函数也好像有问题。
这是需要修改的代码：
#include <iostream>
#include <fstream>
#include <string>
#include <cstdlib>
using namespace std;
const int INITIAL_LIST_CAPACITY = 10;
void build_wordlist (string* w
程序问题不少。。。。
首先函数定义错误，改成：
void build_wordlist (string** word_list, int& capacity, string filename)
或者
int build_wordlist (string** word_list, string filename)
否则1)生成的数组大小capacity无法传出2)word_list无法在函数内重定向以后无法传出
然后里面判断读文件是否结束的条件也错。。。一言难尽，全都帮你改好了
运行正确，用windiff对照一下看看哪里改了
#include "stdafx.h"
#include <iostream>
#include <fstream>
#include <string>
#include <cstdlib>
using namespace std;
const int INITIAL_LIST_CAPACITY = 10;
void build_wordlist (string** word_list, int& capacity, string filename) {
ifstream words;
string word;
int size = 0;
// Allocate the space for the word list
*word_list = new string[INITIAL_LIST_CAPACITY];
capacity = INITIAL_LIST_CAPACITY;
// Open the file
words.open (filename.c_str());
if (!words) {
cerr << "Could not o