C char****数组动态分配行为尴尬

Question

类似于20个小时的事情已经过去了,我仍然不会想要得到什么问题.

首先,这些参数有主要功能.

  char ***matrix;
  int line, maxCollumn, i, j;
  int lineData[100];

然后我正在调用该函数

PutFirstAndLast(&matrix, &line, &maxCollumn, lineData);

此函数用于动态分配我的矩阵并返回其行数和列数.lineData用于存储我在每行上有多少项,因为稍后在函数中我将用""填充"空"空格.

我的麻烦功能有这个标题

int PutFirstAndLast(char**** matrixPointer, int *line2, int *maxCollumn2, int *lineArray)

在这个函数中,我将生成一个以半延迟方式"数组"调用的新矩阵,我将为新的"数组"分配内存,以便将每个单词从文件"in.txt"中放入其中.

int PutFirstAndLast(char**** matrixPointer, int *line2, int *maxCollumn2, int     *lineArray)
 {
FILE *inputFile;
char buffer[100], *p;
char ***array;
int i, j, collumn, maxCollumn = 0, line = -1;




inputFile = fopen("in.txt", "r");

while (fgets(buffer, 100, inputFile))
{

    line++;
    collumn = 0;


    if (line == 0)
        array = (char***)malloc(sizeof(char**));
    else
        array = (char***)realloc(array, sizeof(char**)* (line + 1) );




    p = strtok(buffer, " \n");


    while (p)
    {

             //taking each word and allocating a space for it

        if (collumn == 0)
            array[line] = (char**)malloc(sizeof(char*));
        else
            array[line] = (char**)realloc(array[line], sizeof(char*)*  (collumn + 1));


        array[line][collumn] = (char*)malloc(sizeof(char)* strlen(p) + 1);


        strcpy(array[line][collumn], p);

        collumn++;
        p = strtok(NULL, " \n");
    }


          // Here i count what is the maximum numbers of items on a line


    lineArray[line] = collumn;
    if (collumn > maxCollumn)
        maxCollumn = collumn;



}


    // Here i add "" in the "empty spaces.
for (i = 0; i < line + 1; i++)
{
    for (j = lineArray[i]; j < maxCollumn; j++)
    {
        array[i] = (char**)realloc(array[i], sizeof(char*)* maxCollumn);
        array[i][j] = (char*)malloc(sizeof(char)* 10);
        strcpy(array[i][j], "");
    }

}

fclose(inputFile);


*matrixPointer = array;
*maxCollumn2 = maxCollumn;
*line2 = line;

return 0;
 }

问题是当我来到主要而且我这样做

for (i = 0; i < line + 1; i++)
{
    for (j = 0; j < maxCollumn; j++)
    {
        printf("%s", matrix[i][j]);
        matrix[i][j] = (char*)realloc(matrix, sizeof(char)* 11);
    }

}

对于项目矩阵[2] [0],存在错误"访问违规读取位置".

如果我这样做的话

for (i = 0; i < line + 1; i++)
    {
        for (j = 0; j < maxCollumn; j++)
        {
            printf("%s", matrix[i][j]);
        //  matrix[i][j] = (char*)realloc(matrix, sizeof(char)* 11);
        }

    }

没有问题,矩阵中的所有单词都显示在屏幕上

我的文本模型是:

etesta este astru   
de mext pentru bun 
examen multa programare  

通过在"空"空格中添加"",我指的是:puttin the"in the arraylike this:

etesta   este      astru         
de       mext      pentru        bun 
examen   multa     programare    

Answer 1

你应该使用指针调用realloc函数:matrixmatrix[i][j]

matrix[i][j] = realloc(matrix[i][j], sizeof(char)* 11);

或者,如果您想保护自己免受失败:

char *temp = realloc(matrix[i][j], sizeof(char)* 11);
if (temp != NULL)
    matrix[i][j] = temp;

注意:不要在C中强制转换malloc(或realloc).