Question

我正在尝试使用VS2019从C中的.csv文件读取，并收到断言错误。我遇到的断言错误是_CrtIsValidHeapPointer，我认为它与内存泄漏有关，但是我无法意识到是什么触发了它。

任何帮助将不胜感激。

我的结构如下：

struct movie
{
    double score;
    char* title;
    int year;
    char* actors;
    char* genre;
};

我的功能是：

void readMoviesFromCSV(movie* movies)
{
    FILE* inputFile;
    fopen_s(&inputFile, "Movies.csv", "r");

    if (inputFile == NULL)
    {
        fclose(inputFile);
        printf("Error opening file.\n");
        exit(1);
    }

    char* lineBuffer = (char*)calloc(sizeof(char), 2048);
    char* current = (char*)calloc(sizeof(char), 512);

    fgets(lineBuffer, 2048, inputFile); // Discarding of the header

    for (int i = 0; i < numberOfMovies; i++)
    {
        fgets(lineBuffer, 2048, inputFile);

        current = strtok_s(lineBuffer, ",", &lineBuffer);
        (movies + i)->score = atof(current);

        current = strtok_s(lineBuffer, ",", &lineBuffer);
        strcpy_s((movies + i)->title, 512, current);

        current = strtok_s(lineBuffer, ",", &lineBuffer);
        (movies + i)->year = atoi(current);

        current = strtok_s(lineBuffer, ",", &lineBuffer);
        strcpy_s((movies + i)->actors, 512, current);

        current = strtok_s(lineBuffer, "\n", &lineBuffer);
        strcpy_s((movies + i)->genre, 512, current);

        printf("ID: %d\nScore: %.2lf\nTitle: %s\nYear: %d\nActors: %s\nGenre: %s\n\n", i + 1, (movies + i)->score, (movies + i)->title, (movies + i)->year, (movies + i)->actors, (movies + i)->genre);
    }

    free(lineBuffer);
    free(current);
    fclose(inputFile);
    return;
}

我在main中分配了电影数组：

int main()
{
    movie* movies = (movie*)calloc(sizeof(movie), numberOfMovies);
    for (int i = 0; i < numberOfMovies; i++)
    {
        (movies + i)->title = (char*)calloc(sizeof(char), 512);
        (movies + i)->actors = (char*)calloc(sizeof(char), 512);
        (movies + i)->genre = (char*)calloc(sizeof(char), 512);
    }

    readMoviesFromCSV(movies);
    // free(movies);
    return 0;
}

这里可能是什么问题？

Answer 1

至少这一行是错误的：

movie* movies = (movie*)calloc(sizeof(movie), numberOfMovies);

参数顺序错误。要修复，请将其更改为：

movie* movies = (movie*)calloc( numberOfMovies, sizeof(movie) );

C-调试断言失败：_CrtIsValidHeapPointer（block）

1 个答案: