2D数组中的动态内存分配 [英] Dynamic memory allocation in 2d array

问题描述

scanf语句给我带来麻烦.我尝试用&arr[i][j]和(arr+i)+j代替*(arr+i)+j.但是，此声明仍然存在问题.这是我的代码:

The scanf statement is giving me trouble. I have tried &arr[i][j] and (arr+i)+j in place of *(arr+i)+j. However, this statement is still giving problems. Here is my code:

int **arr, m, n, i, j;
scanf("%d%d", &m, &n);
arr = (int **) malloc( m * sizeof(int *) );

for (i = 0; i < m; i++)
  arr[m] = (int *) malloc(n*sizeof(int));

for(i = 0; i < m; i++)
  for(j = 0; j < n; j++)
    scanf("%d", *(arr + i) + j); //this statement

for(i = 0; i < m; i++) {
  for(j = 0; j < n; j++) {
    printf("%d ", *(*(arr + i) + j));
  printf("\n");
}

getch();
return 0;

推荐答案

有一个严重的错字:

  arr[m] = (int *) malloc(n*sizeof(int));

应该是

  arr[i] = malloc(n * sizeof(int));

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