在結構中使用結構..不能訪問內部結構元素？

嗨，朋友，我是新的，並試圖學習結構...在這裏我已經聲明結構日期結構calc ...但沒有得到想法如何從日期訪問元素。我已經使用malloc保留了內存，用於父結構calc..will，這對於日期結構來說足夠了嗎？。請引導我...謝謝！在結構中使用結構..不能訪問內部結構元素？

#include <stdio.h> 
#include <stdlib.h> 

struct date{ 
    int day; 
    int month; 
    int year; 
}; 

struct calc{ 
    int row; 
    int col; 
    char menu_name[20]; 
    char sub_menu_name[20]; 
    struct date dob; 
}; 

int main() 
{ 
    int count = 0, i; 
    struct calc *my_calc[2]; 

    //here unable to understand that where i need to resever seprate memory for date? 
    my_calc[0] = (struct calc *)malloc(sizeof(struct calc)); 

    //trying to asign the date value 
    for(count; count<2; count++) 
    { 
     printf("Please enter day: ");  
     scanf("%d",&my_calc[count]->date.day); 

     printf("Please enter month: ");  
     scanf("%d",&my_calc[count]->date.month); 

     printf("Please enter Year: ");  
     scanf("%d",&my_calc[count]->date.year); 
    } 

    //trying to print the date value 
    printf("Day: %d\t Month: %d\t Year: %d\n ",my_calc[0]->date.day,my_calc[0]->date.month,my_calc[0]->date.year); 

    system("PAUSE"); 

    return 0; 
}

來源

2013-03-13 studyembedded