/*
整理了下你的代码 : )
*/
typedef struct
{ 
    int    a; 
    int    b; 
}frm_struct; 

frm_struct *my_struct; 

my_struct = new frm_struct;

my_struct-> a=1; 
my_struct-> b=1; 

printf("\n%d\n%d\n",my_struct-> a,my_struct-> b); 

delete my_struct;

typedef struct
{ 
    int    a; 
    int    b; 
}frm_struct; 

int _tmain(int argc, _TCHAR* argv[])
{
    frm_struct *my_struct; 

    my_struct = new frm_struct;

    my_struct-> a=1; 
    my_struct-> b=1; 

    printf("\n%d\n%d\n",my_struct-> a,my_struct-> b); 

    delete my_struct;

    return 0;
}

/*
整理了下你的代码 : )    我再加上Main函数
*/
typedef struct
{ 
    int    a; 
    int    b; 
}frm_struct; 

int main()
{
frm_struct *my_struct; 

my_struct = new frm_struct;

my_struct-> a=1; 
my_struct-> b=1; 

printf("\n%d\n%d\n",my_struct-> a,my_struct-> b); 

delete my_struct;
}

#include       "stdio.h"   
#include       "stdlib.h"   
typedef       struct       {   
                int       a;   
                int       b;   
}       frm_struct;   
int   main(){ 
frm_struct       *my_struct = (frm_struct *)malloc(sizeof(frm_struct));   
my_struct-> a=1;   
my_struct-> b=1;   
printf("\n%d\n%d\n",my_struct->   a,my_struct->   b);   
free(my_struct);
return   0; 
}