1.

Explain the structure of C++ program. Give example? 

Answer»

#include<iostream>

//main() is where program execution begins.

int main()

{

count<<"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 program execution begins, is a single-line comment available in C++. Single-line comments begin with // and stop at the end of the line.
  • The line int main() is the main function where program execution begins.
  • The pair of { } indicate the body of the main function.
  • The next line cout << “Hello world.”; causes the message “Hello world” to be displayed on the screen.
  • The next line return 0; terminates the main () function and causes it to return the value 0 to the calling process. 


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