what is a ~ in c++

cv2.error: opencv(4.2.0) c:\projects\opencv-python\opencv\modules\imgproc\src\color.cpp:182: error: (-215:assertion failed) !_src.empty() in function 'cv::cvtcolor'

Fatal error: Composer detected issues in your platform: Your Composer dependencies require a PHP version ">= 7.3.0". You are running 7.2.19. in C:\php\largon\laragon\www\medmazza-simple-master\vendor\composer\platform_check.php on line 24

./node_modules/react-chartjs-2/dist/index.modern.js Module not found: Can't resolve 'chart.js/auto' in 'C:\Users\shadi\WebstormProjects\PI_HR_HUB\node_modules\react-chartjs-2\dist'

opencv(4.5.1) c:\users\appveyor\appdata\local\temp\1\pip-req-build-kh7iq4w7\opencv\modules\imgproc\src\resize.cpp:4051: error: (-215:assertion failed) !ssize.empty() in function

opencv(4.4.0) c:\users\appveyor\appdata\local\temp\1\pip-req-build-71670poj\opencv\modules\imgproc\src\color.cpp:182: error: (-215:assertion failed) !_src.empty() in function

function that, given the number of rows N and a list of reserved seats as string S returns the maximum of four-person families that can be seated in the remaining unreserved seats c++

has_cap was called with an argument that is deprecated since version 2.0.0! Usage of user levels is deprecated. Use capabilities instead. in C:\xampp 2\htdocs\dashboard\wordpress single\wp-includes\functions.php on line 4997

RuntimeError: The current Numpy installation ('C:\\Users\\farka\\AppData\\Local\\Programs\\Python\\Python38\\lib\\site-packages\\numpy\\__init__.py') fails to pass a sanity check due to a bug in the windows runtime.

Given a String S. Find out which of the following basic C++ data types it represents and its size (in bytes). The possible data types are: 1. Integer 2. Float 3. Double 4. Character

he current Numpy installation ('C:\\Users\\muham\\.virtualenvs\\Backend-vjttHJMD\\lib\\site-packages\\numpy\\__init__.py') fails to pass a sanity check due to a bug in the windows runtime. See this issue for more information: https://tinyurl.com/y3dm3h86