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C/C++ code:

typedef struct {
int a;
void (*set_a)(int val);
} test_t;

void my_set_a(int val)
{
/* ÄÄÀïÄܵõ½Õâ¸öÖ¸Ïò²»Í¬ÊµÀýµÄthisÖ¸Õ룿 */
this->a = val;
}

void main(void)
{
test_t test;

test.set_a = my_set_a;

test.set_a(1);
}




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C/C++ code:
typedef struct _test_t{
int a;
void (*set_a)(_test_t*, int val);
} test_t;

void my_set_a(test_t* this, int val)
{
this->a = val;
}

void main(void)
{
test_t test;

test.set_a = my_set_a;

test.set_a(&test, 1);
}

---

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C/C++ code:

#include <stdio.h>

typedef struct
{
void *p;
int ma;
void (*vshow)(void *this);
} A;

typedef struct
{
A parent;
void *p;
int mb;
char name[2];
} B;


typedef struct
{
void (*set_ma)(void *this, int a);
} AC;

typedef struct
{