Allocating and releasing two-dimensional arrays in C

  
 

   
  

  
/*
   
  

  
动态分配二维数组，在数据量很多的时候也不会导致程序崩溃
   
  

  
注意要free掉
   
  

  
sizeOfElement: 数组中每个元素的大小
   
  

  
row: 行数，从1开始计数
   
  

  
col: 列数，从1开始计数
   
  

  
*/
   
  

  
void     * *   Malloctwodimensionarray   ( unsigned   sizeofelement       row     unsigned   col    
   
  

  
  void   **  DP  =    ( sizeof   ( void    *)    *   row  );   
   
  

  
for (int i = 0; i< row; i++)
   
  

  
dp[i] = malloc(sizeOfElement*col);
   
  

  

   
  

  
return dp;
   
  

  
}
   
  

  

   
  

  
void freeTwoDimensionArray(void *arr, unsigned row, unsigned col){
   
  

  
int ** intArr = (int **)arr;
   
  

  

   
  

  
for (unsigned i = 0; i < row; ++i){
   
  

  
free(intArr[i]);
   
  

  
}
   
  

  

   
  

  
free(arr);
   
  

  
}
  
 

From for notes (Wiz)

Allocating and releasing two-dimensional arrays in C