使用.open(）成员函数C++的ifstream数组的错误访问代码

bad access code with array of ifstream using .open() member function C++

本文关键字：ifstream 数组 访问 代码 错误 C++ open 成员 函数 使用      更新时间：2023-10-16

我有一个相当简单的任务，我有两个有50个名字的文本文件，我向用户查询文本文件"女孩的名字"或"男孩的名字"和一个名字，然后程序检查用户输入的名字是否在他们选择的文件中。我想我基本上已经得到了，但当我试图打开第二个文件时，我得到了一个错误的访问代码。我读过关于内存分配的问题，我认为这是我的代码的问题，但答案超出了我的理解水平，所以我陷入了困境。

#include <iostream>
#include <fstream>
#include <string>
using namespace std;
int main() {
    // Declare Variables
    ifstream inFile[1]; // male and female file streams
    int inFileArrayVar = 0; // allows switching from female and male file streams
    string gender;
    string name[50];
    string inputName;
    int popular = 0;
    bool inputCondition = 1;
    bool progLoop = 1;
    // Welcome Message
    cout << "*o*o*o*o*o*o*o*o*o*o*o*o*o*o*o*o*o*o*o*o*o*o" << 'n'
    << "    WELCOME TO THE GENDER BINARY MACHINE" << 'n'
    << "*o*o*o*o*o*o*o*o*o*o*o*o*o*o*o*o*o*o*o*o*o*o" << 'n' << 'n'
    <<  "Enter a name and see if it is one of the most popular Canadian female or male names in 2015. " << 'n' << 'n';
    // Open Files
    inFile[0].open("GirlsNamesCanada2015.txt");
    inFile[1].open("BoysNamesCanada2015.txt");
    // User Query
    while (inputCondition == 1){
    cout << "Choose to query either the male or female database by entering 'f' or 'm' " << 'n';
    cin >> gender;
        if (gender == "f") {
            cout << "You have selected the female name database. Enter the name you'd like to search: " << 'n';
            inFileArrayVar = 0;
            inputCondition = 0;
        }
        else if (gender == "m"){
            cout << "You have selected the male name database. Enter the name you'd like to search: " << 'n';
            inFileArrayVar = 1;
            inputCondition = 0;
        }
        else
            inputCondition = 1;
    }
    while (progLoop == 1){
        cin >> inputName;
    for (int i = 0; i < 50; i++) {
        inFile[inFileArrayVar] >> name[i];
        if (inputName.compare(name[i]) == 0) {
            popular = 1;
            cout << inputName << " was one of the most popular names in 2015." << 'n' << 'n';
            i = 50;
        }
    }
            if (popular == 0){
                cout << inputName << " was not one of the most popular names is 2015." << 'n' << 'n';
            }
    cout << "If you want to contine, enter either 'f' or 'm', otherwise enter any other character. " << 'n';
        cin >> gender;

        if (gender == "f"){
            cout << "You have selected the female name database. Enter the name you'd like to search: " << 'n';
            inFileArrayVar = 0;
        }
        else if (gender == "m"){
            inFileArrayVar = 1;
            cout << "You have selected the male name database. Enter the name you'd like to search: " << 'n';
        }
        else
            progLoop = 0;

    }
    cout << "merci d'avoir choisi le GENDER BINARY MACHINE ******* pce out ******** " << 'n' << 'n';

    return 0;
}

ifstream inFile[1]; // male and female file streams

在这里，您声明了一个带有一个元素的数组。这个数组有一个元素。这就是[1]的意思。

inFile[0].open("GirlsNamesCanada2015.txt");
inFile[1].open("BoysNamesCanada2015.txt");

然后尝试访问数组中的元素#0和元素#1，这是一个元素数组中的第一个和第二个元素。可能出了什么问题？

当您声明数组时：

type array[n];

这意味着数组包含元素#0到元素#n-1。

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