#include<stdio.h>
int main(void)
{
    char *ptr = (char *)malloc(sizeof(char) * 2);
    ptr[0] = '0';
    ptr[1] = '1';
    printf("'%c'\n", ptr[0]);
    printf("'%c'\n", ptr[1]);



    /*
    int *ptr = (int *)malloc(sizeof(ptr) * 2);
    ptr[0] = 0;
    ptr[1] = 1;
    printf("%d\n", ptr[0]);
    printf("%d\n", ptr[1]);
    */
    //free(ptr);
    return 0;
}