C Basic Introduction (Continued..) (Day two)

C Basic Introduction (Continued..) – A look at first C++ Program 

Line 1:     // My First C++ Program
Line 2:     #include<iostream.h>
Line 3:     int main()
Line 4:          {
Line 5:           cout<<"Welcome To Your First Program";
Line 6:           return 0;
Line 7:          }

The program is the simplest program and includes some of basic elements that every program mainly have. Lets have a look on these basic elements – Line 1:   //My First C++ Program This is a comment. lines begin with // are comments. These are the pieces of code that compiler never executes. Purpose- It allows the programmer to insert some notes or descriptions to enhance readability or understandability of the program. There are two ways in C++ to insert comments –

1. Single Line Comments – By // . Compiler simply ignores  any line begining with // in that same line.
2. Multiline or block comments – Everything between /* …… */ is considered as a comment. These are the block comments i.e. everything that falls between /* ….. */ is considered a comment even though it is spread across many lines.

For example,

// My First C++ Program
#include<iostream.h>
int main()
     {
     cout<<"Say Hello to Your First Program";     /* This is a simple
                                                      program having one
                                                      output statement
                                                      for the purpose of
                                                      explaining comments.
                                                  */
     return 0;
     }

Line 2: #include<iostream.h> Line 3: int main() Line 4 to Line 7 :  ]]>