用指针指向结构体中的某一个元素的方法

#include <stdio.h>

struct St_Test{
    int t1;
    int t2;
    int t3;
    int t4;
};

void main()
{
    struct St_Test St_Test_Ex;
    struct St_Test *Str_Ptr;
    Str_Ptr = &St_Test_Ex;
    
    int *p ;
    p = (int*) Str_Ptr;
    
    Str_Ptr->t1 = 11;
    Str_Ptr->t2 = 22;
    Str_Ptr->t3 = 33;
    Str_Ptr->t4 = 44;
    
    printf("%d\n",*(p+0));
    printf("%d\n",*(p+1));
    printf("%d\n",*(p+2));
    printf("%d\n",*(p+3));
}