1.

Explain the structure of a C++ program with an example. 

Answer»

# include <iostream>

// main() is where program execution begins.

int main ()

{

cout <<"Hello World";// prints Hello World

return 0;

}

The various parts of the above program: 

  • headers, which contain information that is either necessary or useful to program. For this program, the header is needed.
  • The next line // main() is where the program execution begins. It is a single-line comment available in C++. Singleline comments begin with // and stop at the end of the line.
  • The line int main() is the main function where the program execution begins.
  • The pair of {} indicates the body of the main function.
  • The next line cout>> “This is my first C++ program.”; causes the message “This is my first C++ program” to be displayed on the screen.
  • The next line return 0; terminates main( )function and causes it to return the value 0 to ‘ the calling process.


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