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'double pointers C++
#include <stdio.h>
int main(void)
{
int value = 100;
int *value_ptr = &value;
int **value_double_ptr = &value_ptr;
printf("Value: %d\n", value);
printf("Pointer to value: %d\n", *value_ptr);
printf("Double pointer to value: %d\n", **value_double_ptr);
}Copyright © 2021 Codeinu
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