#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <regex>
 
struct AAA{
    unsigned char* type = nullptr;
    unsigned char* str = nullptr;
    int xxx;
    int yyy;
};
struct BBB{
    unsigned char* type = nullptr;
    unsigned char* str = nullptr;
    int zzz;
};
 
int main(int argc, char *argv[])
{
    // 前準備
    char aaa_str_temp[9] = {0x41,0x42,0x43,0x31,0x32,0x33,0x44,0x45,0x46};
    AAA aaa;
    AAA* p_aaa = &aaa;
    p_aaa->type = (unsigned char*)malloc(1);
    p_aaa->type[0] = 0x01;
    p_aaa->str = (unsigned char*)malloc(10);
    memcpy(p_aaa->str, aaa_str_temp, 9);
    p_aaa->str[9] = 0x00;
 
    char bbb_str_temp[9] = {0x55,0x56,0x57,0x34,0x35,0x36,0x58,0x59,0x5a};
    BBB bbb;
    BBB* p_bbb = &bbb;
    p_bbb->type = (unsigned char*)malloc(1);
    p_bbb->type[0] = 0x02;
    p_bbb->str = (unsigned char*)malloc(10);
    memcpy(p_bbb->str, bbb_str_temp, 9);
    p_bbb->str[9] = 0x00;
 
    // まずは内容確認
    printf("変更前AAA %02x  %s\n", p_aaa->type[0], p_aaa->str);
    printf("変更後BBB %02x  %s\n", p_bbb->type[0], p_bbb->str);
 
    //--------------------------------------------------------------------------------
    // ここから同じ処理をp_aaa, p_bbb, 両方書かないといけない。。
    //--------------------------------------------------------------------------------
    unsigned char* aaa_str_new = (unsigned char*)realloc(p_aaa->str, 12);
    if( aaa_str_new == NULL ){
        printf("error\n"); exit(1);
    }
    // アドレス変わったら置き換え
    if( p_aaa->str != aaa_str_new ){
        p_aaa->str = aaa_str_new;
    }
    p_aaa->str[9] = 0x41;                                                                                                                        
    p_aaa->str[10] = 0x41;
    p_aaa->str[11] = 0x00;
 
    unsigned char* bbb_str_new = (unsigned char*)realloc(p_bbb->str, 12);
    if( bbb_str_new == NULL ){
        printf("error\n"); exit(1);
    }
    // アドレス変わったら置き換え
    if( p_bbb->str != bbb_str_new ){
        p_bbb->str = bbb_str_new;
    }
    p_bbb->str[9] = 0x41;
    p_bbb->str[10] = 0x41;
    p_bbb->str[11] = 0x00;
    //--------------------------------------------------------------------------------
    // ここまで
    //--------------------------------------------------------------------------------
 
    printf("\n");
    printf("変更後AAA %02x  %s\n", p_aaa->type[0], p_aaa->str);
    printf("変更後BBB %02x  %s\n", p_bbb->type[0], p_bbb->str);
 
    return(1);
}
 
 

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