我正在嘗試編寫接受用戶輸入的文件名稱的程序。從那裏它將文件中的數字存儲到數組中,對它們進行排序,然後顯示它們。但是,我得到的數字與訪問超出界限的數組類似,但我可以從調試器中知道我不是。未正確分配數組
#include <iostream>
using namespace std;
class TestScores
{
public:
TestScores();
TestScores(int scores);
~TestScores();
void AddScore(int newScore);
void DisplayArray();
void SortScores();
bool ArraySorted();
int AvgScore();
private:
int *scoresArray; //Dynamically allocated array
int numScores; //number of scores input by user
int scoreCounter;
const static int default_NumArrays=10; //Default number of arrays
};
#include <iostream>
#include "TestScores.h"
TestScores::TestScores()
{
scoresArray=new int[default_NumArrays];
scoreCounter=0;
numScores=default_NumArrays;
}
TestScores::TestScores(int scores)
{
scoresArray=new int[scores];
numScores=scores;
scoreCounter=0;
for(int i=0; i<scores;i++)
scoresArray[i]=0;
}
TestScores::~TestScores()
{
delete[] scoresArray;
}
void TestScores::AddScore(int newScore)
{
if(scoreCounter<numScores){
scoresArray[scoreCounter]=newScore;
scoreCounter++;
}
else
cout<<"More scores input than number of scores designated"<<endl;
}
void TestScores::DisplayArray()
{
for(int i=0; i<numScores; i++)
cout<<scoresArray[i]<<endl;
cout<<endl<<"This is scoresArray"<<endl;
}
bool TestScores::ArraySorted()
{
for(int i=0; i<(scoreCounter-1);i++){
if(scoresArray[i]<=scoresArray[i+1])
continue;
else
return false;
}
return true;
}
void TestScores::SortScores()
{
int tempValue;
while(ArraySorted()!=true){
for(int i=0; i<(scoreCounter-1); i++){
if(scoresArray[i]<=scoresArray[i+1])
continue;
else{
tempValue=scoresArray[i+1];
scoresArray[i+1]=scoresArray[i];
scoresArray[i]=tempValue;
}
}
}
}
int TestScores::AvgScore()
{
int sumScores=0;
if(scoreCounter>0){
for(int i=0; i<scoreCounter; i++)
sumScores+=scoresArray[i];
return (sumScores/scoreCounter);
}
else{
cout<<"There are no scores stored."<<endl;
return 0;
}
}
#include "TestScores.h"
#include <iostream>
#include <fstream>
#include <string>
using namespace std;
//Function prototypes
bool FileTest(ifstream& inData);
void StoreScores(ifstream& inData, int& newNumScores, TestScores satScores);
int main()
{
int newNumScores=0;
string inputFile; //Contains name of the user file being used
//Opening file stream
ifstream inData;
//User prompt for input file
cout<<"Please enter the file name containing the student scores you wish to "
<<"have stored, sorted, and displayed."<<endl;
cin>>inputFile;
//Opening file streams
inData.open(inputFile.c_str());
while(FileTest(inData)==false){
cout<<"I'm sorry, the file you entered was not a valid file. "
<<"Please enter another file name, or enter q to exit"<<endl;
cin>>inputFile;
if(inputFile=="q")
return 0;
//Opening file streams
inData.open(inputFile.c_str());
}
inData>>newNumScores;
TestScores satScores(newNumScores); //Instantiating TestScores variable
StoreScores(inData, newNumScores, satScores); //Storing scores into array
satScores.DisplayArray();
satScores.SortScores();
satScores.DisplayArray();
cout<<endl<<"This is the array after sorting"<<endl<<endl;
cout<<"This is the average score "<<satScores.AvgScore()<<endl;
//Program pauses for user input to continue
char exit_char;
cout<<"\nPress any key and <enter> to exit\n";
cin>>exit_char;
inData.close();
return 0;
}
bool FileTest(ifstream& inData)
{
if(!inData)
{
cout<<"Your file did not open.\n";
return false;
}
return true;
}
void StoreScores(ifstream& inData, int& newNumScores, TestScores satScores)
{
int userScore;
while(inData>>userScore){
satScores.AddScore(userScore);
}
}
我的測試文件是random.dat幷包含以下內容:
15
67
76
78
56
45
234
基礎上,通過調試器看,我可以告訴大家,scoreCounter正確遞增和newScore包含的下一個值,所以爲什麼它不被存儲在數組中?感謝您的幫助
這些大數字到底是什麼?這可能是與[這個問題和我的答案]的問題相關的東西(http://stackoverflow.com/questions/5447002/how-to-read-a-birthday-with-symbols-and-from-a-txt -file/5447085#5447085)以Unicode編碼的文本文件,C++本身無法識別。 – Xeo 2011-03-29 01:26:51
它看起來像這樣15 10位數字# neg。 8位數字# neg 10位數字#和一對更負的10位數字 – ChadM 2011-03-29 01:30:37
@Chad:好的,我用你的代碼做了一個快速測試,得到相同的數字,並在退出應用程序後斷言失敗。在我研究錯誤時請保持穩定。 :) – Xeo 2011-03-29 01:37:44