getchar and dynamic arrays

#include <stdio.h>
#include <stdlib.h>
int main(){
    char **ptr;
    ptr=calloc(10,sizeof(char));
    printf("\nEnter the Name : ");

    int val, i, j;
    unsigned char temp;
    while((val = getchar())!='\n'){
        printf("flag\n");
        //ptr[i] = (char) val;
        temp = (char) val;
        ptr[i] = &temp; //need to dereference this variable
        i++;            //to assign to dynamic array
    }
    for (j=0; j<i; j++)
    printf("ptr[%d] = %s\n", i, ptr[i]);
    free(ptr);
    return 0;
}