char buf1[] = {0x31,0x32,0x33,0x00,0x51,0x52,0x53,0xaa,0xbb,0xcc,0x00};

    int a=0xabcd6799;

    int b=0x88991122;

    int d=0x12345678;

    int c=sizeof(int)*+sizeof(buf1);

    printf("%d\n",c);

    char *buf2=malloc(c);

    char *buf3=buf2;

    memcpy(buf2,&a,sizeof(int));

    buf2+=sizeof(int);

    memcpy(buf2,&b,sizeof(int));

    buf2+=sizeof(int);

    memcpy(buf2,buf1,sizeof(buf1));

    buf2+=sizeof(buf1);

    memcpy(buf2,&d,sizeof(int));

    int i=;

    for(;i<c;i++){

        printf("0X%02X ",buf3[i]);

    }

    printf("\n");