getenv() - Utility Function
How is Utility function "getenv()" used in C++?
How to Get the Environment String using C++?
Explanation
getenv() is a Utility Function that returns a pointer to the environmental variable which is given as an argument.This function returns a null terminated string or a NULL, if the variable does'nt exist.
char *getnev(const char *name);
Result :
The current path is: (null)
In the above example getenv() function returns a "NULL" value since the environmental variable for "LIB" is not available.
Syntax to get the Environment String:
char *getnev(const char *name);
Example :
| #include <stdlib.h> #include <stdio.h> int main () { printf ("The current path is: %s",getenv("LIB")); return 0; } |
Result :
The current path is: (null)
In the above example getenv() function returns a "NULL" value since the environmental variable for "LIB" is not available.
