VS2008工程，因结构体字节对其问题导致的string赋值出现崩溃，求大佬解答

[lhw330472787]

未手动字节对其的情况下，sizeof(结构体) = 77， 在手动对其的情况下赋值不出现崩溃， 求大佬求解！

[zgl7903]

#pragma pack 指定结构体字节对齐试试看

#pragma pack(push, 8)
typedef struct _tagxxxx_t
{
}xxxx;
#pragma pack(pop)

[lhw330472787]

#pragma pack 我试过不会崩溃， 结构体变量位置调整也不会出现崩溃。我只是想知道为啥string赋值会崩了

[lhw330472787]

结构体以这种形式定义也不会出现崩溃
int iLine;
int iCorner;
int total_layer;
float pixel_to_mm;
float min_length;
float max_length;
float max_angle_thresh;

bool isDrawBarcode; // 是否在图片上绘制条码

bool isDrawLine;
bool isShowData;
bool isShowAngle;
bool isDetectAngle:2;

cv::Rect detected_rect;
std::string strBarcode;

[sevancheng]

这个结构体要写深拷贝构造和重载赋值操作符

[lhw330472787]

已经有写了赋值操作符，这是一整个结构体代码

typedef struct stInputParams
{
int iLine;
int iCorner;
int total_layer;
float pixel_to_mm;
float min_length;
float max_length;
float max_angle_thresh;

bool isDrawBarcode; // 是否在图片上绘制条码

bool isDrawLine;
bool isShowData;
bool isShowAngle;
bool isDetectAngle;

cv::Rect detected_rect;
std::string strBarcode;

stInputParams()
{
iLine = 1;
iCorner = 1;
total_layer = 5;
pixel_to_mm = 0.01f;
min_length = 0.1;
max_length = 1.4f;
max_angle_thresh = 90.0f;

isDrawBarcode = false;

isDrawLine = true;
isShowData = true;
isDetectAngle = true;
isShowAngle = true;
detected_rect = cv::Rect(0, 0, 0, 0);
strBarcode = std::string("ERROR");
}

stInputParams operator=(const stInputParams& params)
{
iLine = params.iLine;
iCorner = params.iCorner;
total_layer = params.total_layer;
pixel_to_mm = params.pixel_to_mm;
min_length = params.min_length;
max_length = params.max_length;
max_angle_thresh = params.max_angle_thresh;

isDrawBarcode = params.isDrawBarcode;

isDrawLine = params.isDrawLine;
isShowData = params.isShowData;
isDetectAngle = params.isDetectAngle;
isShowAngle = params.isShowAngle;
detected_rect = params.detected_rect;
strBarcode = params.strBarcode;

return(*this);
}

}stInputParams;

[zgl7903]

引用 5 楼 lhw330472787 的回复:

已经有写了赋值操作符，这是一整个结构体代码 typedef struct stInputParams { int iLine; int iCorner; int total_layer; float pixel_to_mm; float min_length; float max_length; float max_angle_thresh; bool isDrawBarcode; // 是否在图片上绘制条码 bool isDrawLine; bool isShowData; bool isShowAngle; bool isDetectAngle; cv::Rect detected_rect; std::string strBarcode; stInputParams() { iLine = 1; iCorner = 1; total_layer = 5; pixel_to_mm = 0.01f; min_length = 0.1; max_length = 1.4f; max_angle_thresh = 90.0f; isDrawBarcode = false; isDrawLine = true; isShowData = true; isDetectAngle = true; isShowAngle = true; detected_rect = cv::Rect(0, 0, 0, 0); strBarcode = std::string("ERROR"); } stInputParams operator=(const stInputParams& params) { iLine = params.iLine; iCorner = params.iCorner; total_layer = params.total_layer; pixel_to_mm = params.pixel_to_mm; min_length = params.min_length; max_length = params.max_length; max_angle_thresh = params.max_angle_thresh; isDrawBarcode = params.isDrawBarcode; isDrawLine = params.isDrawLine; isShowData = params.isShowData; isDetectAngle = params.isDetectAngle; isShowAngle = params.isShowAngle; detected_rect = params.detected_rect; strBarcode = params.strBarcode; return(*this); } }stInputParams;

单独测试这个没有问题啊, 是不是其他地方引起的越界/或类信息被修改的操作？