The getenv() Function

The ANSI function getenv() returns the value of an environment variable. getenv() takes a C-string containing an environment variable and returns its value. In the following example, getenv() detects the value of the environment variable PATH:

  
  #include <stdlib.h>
  int main()
  {
    char * curr_path = getenv("PATH");
    cout<<p; 
  }
 
A typical output string of this program may look like this:
  
  C:\\WINDOWS;C:\\WINDOWS\\COMMAND;C:\\MOUSE;
 
Using getenev() instead of a platform specific API has two advantages: your code is portable because getenv() is a standard functions, and the application doesn't need to link to MFC or Win API runtime libraries and dll's that have adverse effects on a program's speed and size.


														Danny Kalev
														 
														
															
																
																	
																		
																			
																				
																			
																		
																		
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