c++ - 动态结构数组错误

尝试创建ContestantInfo *contestantStructArray = new ContestantInfo [numberOfContestants];时出现错误“分配不完整的类型”

这是我的代码：

#include <fstream>
#include <iostream>

using namespace std;

struct ContestantInfo;

int main()
{
    //opens all the files for input and output
    fstream contestantsFile("contestants.txt", ios::in);
    fstream answerKeyFile("answers.txt", ios::in);
    fstream reportFile("report.txt", ios::out);

    //used to determine how many contestants are in the file
    int numberOfContestants = 0;
    string temp;

    //checks to see if the files opened correctly
    if(contestantsFile.is_open() && answerKeyFile.is_open() && reportFile.is_open()){

        //counts the number of lines in contestants.txt
        while(getline(contestantsFile, temp, '\n')){

            numberOfContestants++;

        }

        //Puts the read point of the file back at the beginning
        contestantsFile.clear();
        contestantsFile.seekg(0, contestantsFile.beg);

        //dynamic array that holds all the contestants ids
        string *contestantIDNumbers = new string [numberOfContestants];

        //Reads from the contestants file and initilise the array
        for(int i = 0; i < numberOfContestants; i++){

            getline(contestantsFile, temp, ' ');

            *(contestantIDNumbers + i) = temp;

            //skips the read point to the next id
            contestantsFile.ignore(256, '\n');

        }

        ContestantInfo *contestantStructArray = new ContestantInfo [numberOfContestants];

    }
    else
    {
        cout << "ERROR could not open file!" << endl;
        return 0;
    }

}

struct ContestantInfo{

    string ID;
    float score;
    char *contestantAnswers;
    int *questionsMissed;

};

如果更改任何内容，Struct ContestantInfo中的指针最终也应该指向动态数组。我是学生，所以如果我做一些愚蠢的事情，请不要退缩。

最佳答案

根据编译器，您的问题是该结构的正向声明（在尝试创建它们的数组时）。请参阅此问题及其答案：Forward declaration of struct

问候