linux下sprintf_s函数的替代

error code:

char buf[256];
sprintf_s(buf, 256, "predicted position:(%3d, %3d)", predict_pt.x, predict_pt.y);
cv::putText(image, buf, cv::Point(10,30), CV_FONT_HERSHEY_SCRIPT_COMPLEX, 1, cv::Scalar(0,0,0), 1, 8);
sprintf_s(buf, 256, "current position :(%3d, %3d)", mousePosition.x, mousePosition.y);
cv::putText(image, buf, cv::Point(10,60), CV_FONT_HERSHEY_SCRIPT_COMPLEX, 1, cv::Scalar(0,0,0), 1, 8);

error discription:

‘sprintf_s’ was not declared in this scope
sprintf_s(buf, 256, "predicted position:(%3d, %3d)", predict_pt.x, predict_pt.y);

windows平台下线程安全的格式化字符串函数sprint_s并非标准C函数，因此linux下无法使用，但可以使用snprintf函数代替。

right code:

char buf[256];
snprintf(buf, 256, "predicted position:(%3d, %3d)", predict_pt.x, predict_pt.y);
cv::putText(image, buf, cv::Point(10,30), CV_FONT_HERSHEY_SCRIPT_COMPLEX, 1, cv::Scalar(0,0,0), 1, 8);
snprintf(buf, 256, "current position :(%3d, %3d)", mousePosition.x, mousePosition.y);
cv::putText(image, buf, cv::Point(10,60), CV_FONT_HERSHEY_SCRIPT_COMPLEX, 1, cv::Scalar(0,0,0), 1, 8);

Re:

1.linux下sprintf_s函数的替代;

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