Dolphins have excellent eyesight and hearing. Underwater they use echolocation. Echolocation is kind of like sonar where dolphins make a sound and then listen to the echo. Their hearing is so sensitive to these echoes that they can almost see objects in the water by hearing. This allows dolphins to locate food in cloudy or dark water.
This is the latest accepted revision, reviewed on 16 April 2017. Source code of a simple computer program written in the C programming language, which will output the Hello, world! message when compiled and run. A programming language is a formal computer language designed to communicate instructions to a machine, particularly a computer.
Hello World - Writing, Compiling and Running a C++ Program. When you write a program, you use a development environment. Your development environment can be a basic text editor or a feature rich C++ integrated development environment (IDE).