c/c++语言开发共享在单个malloc（）调用中创建2D数组

#include  #include  #define MAX_ROWS 5 #define MAX_COLS 5 int globalvariable = 100; void CreateMatrix(int ***Matrix) { int **ptr; char *cp; int i = 0; *Matrix = (int**)malloc((sizeof(int*) * MAX_ROWS) + ((MAX_ROWS * MAX_COLS)*sizeof(int))); ptr = *Matrix; cp = (char*)((char*)*Matrix + (sizeof(int*) * MAX_ROWS)); for(i =0; i < MAX_ROWS; i++) { cp = (char*)(cp + ((sizeof(int) * MAX_COLS) * i)); *ptr = (int*)cp; ptr++; } } void FillMatrix(int **Matrix) { int i = 0, j = 0; for(i = 0; i < MAX_ROWS; i++) { for(j = 0; j < MAX_COLS; j++) { globalvariable++; Matrix[i][j] = globalvariable; } } } void DisplayMatrix(int **Matrix) { int i = 0, j = 0; for(i = 0; i < MAX_ROWS; i++) { printf("n"); for(j = 0; j < MAX_COLS; j++) { printf("%dt", Matrix[i][j]); } } } void FreeMatrix(int **Matrix) { free(Matrix); } int main() { int **Matrix1, **Matrix2; CreateMatrix(&Matrix1); FillMatrix(Matrix1); DisplayMatrix(Matrix1); FreeMatrix(Matrix1); getchar(); return 0; } 

如果代码被执行，我会在对话框中收到以下错误消息。

 Windows has triggered a breakpoint in sam.exe. This may be due to a corruption of the heap, which indicates a bug in sam.exe or any of the DLLs it has loaded. This may also be due to the user pressing F12 while sam.exe has focus. The output window may have more diagnostic information. 

我尝试在Visual Studio中调试printf("n"); 执行DisplayMatrix()语句，再现相同的错误消息。

如果我按下继续，它会按预期打印101到125。 在发布模式下，没有问题!!! 。

请分享您的想法。

 int width = somewidth /* put some useful width computation */; int height = someheight /* put some useful height computation */ int *mat = calloc(width*height, sizeof(int)); if (!mat) { perror ("calloc"); exit (EXIT_FAILURE); }; 

 for (int i=0; i 

  { int matrix [NUM_COLS][NUM_ROWS]; /* do something with matrix */ } 

  struct matrix_st { int matfield [NUM_COLS][NUM_ROWS]; }; struct matrix_st *p = malloc(sizeof(struct matrix_st)); if (!p) { perror("malloc"); exit(EXIT_FAILURE); }; 

  for (int i=0; imatfield[i][j] = i+j; 

 int (*mat)[MAX_COLS] = malloc(MAX_ROWS * sizeof(*mat));