2d array dynamic memory allocation in c code example
Example 1: array 2d dynamic allocation c++
int** a = new int*[rowCount];
for(int i = 0; i < rowCount; ++i)
a[i] = new int[colCount];
Example 2: double pointer malloc in c
char *x; // Memory locations pointed to by x contain 'char'
char **y; // Memory locations pointed to by y contain 'char*'
x = (char*)malloc(sizeof(char) * 100); // 100 'char'
y = (char**)malloc(sizeof(char*) * 100); // 100 'char*'
// below is incorrect:
y = (char**)malloc(sizeof(char) * 50 * 50);
// 2500 'char' not 50 'char*' pointing to 50 'char'