Question

我有一个全局char *，在运行时，重新声明为指向声明为此way的2D数组的指针：

char (*A)[N][M] = malloc(sizeof(char[BUF_16][N][M]));

然后我将一个文件读入我的字符串A矩阵，其中函数read2mat使用子例程tokenizer2D和removeEOF，这里是代码：

void removeEOF(char *s)
{
    char *newline = strchr( s, '\n' );
    if ( newline )
        *newline = 0;
}

void tokenizer2D(char *s, const char *delimiter, char *rowVec)
{
  char *saveptr; 
  char *token = strtok_r(s, delimiter, &saveptr);
  int j = 0;
  while (token)
    {
      printf("token: %s ", token);
      strcpy(&rowVec[j], token);
      token = strtok_r(NULL, delimiter, &saveptr);
      j++;
    }
  fputc('\n', stdout);

}

void read2mat(char filename[], const char delim[], int nrows, int ncols, int maxStrSize, char (*mat)[nrows][ncols])
{

  ncols = fmax(ncols, 1);
  // open the file for reading
  FILE *f = fopen(filename, "r");

  // make sure the file opened properly
  if(NULL == f)
    {
      fprintf(stderr, "Cannot open file: %s\n", filename);
      return;
    }

  char linea[maxStrSize];

  int i=0;
  while (fgets(linea, maxStrSize, f) != NULL)
    {
      removeEOF(linea); // elimina '\n' del string
      tokenizer2D(linea, delim, &mat[i][0]);
      linea[0] = '\0';
      i++;
    }
  fclose(f);
}

然后我这样称呼它： read2mat(myfile, delim, N, M, BUF_32, A);

虽然在tokenizer2D函数中正确打印了从每行读取的标记，但我无法正确地将它们读入rowVec的每个元素，可能是由于索引不良。

Answer 1

更改为

char (*A)[M][BUF_32] = malloc(sizeof(char[N][M][BUF_32]));
...
void read2mat(char filename[], const char delim[], int nrows, int ncols, int maxStrSize, char (*mat)[ncols][maxStrSize])

或

void read2mat(char filename[], const char delim[], int nrows, int ncols, int maxStrSize, char mat[nrows][ncols][maxStrSize])

致电read2mat(myfile, delim, N, M, BUF_32, A);

将指针传递给2D VLA作为填充C中行向量的函数参数

1 个答案: