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c:stdlib.h:getenv

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c:stdlib.h:getenv [2013/01/22 22:02] (current)
Line 1: Line 1:
 +{{keywords>wiki library source code example reference}}
 +====== getenv ======
 +<code c>
 +    #include <stdlib.h>
 +    char *getenv(const char *name);
 +</code>    
 +
 +getenv matches the string pointed to by name\\
 +
 +returns a pointer to the value in the environment, or NULL if there is no match.\\
 +
 +===== getenv C Sourcecode Example =====    
 +<code c>
 +/* 
 + * getenv example code
 + * http://code-reference.com/c/stdlib.h/getenv
 + */
 +#include <stdio.h> /* including standard library */
 +//#include <windows.h> /* uncomment this for Windows */
 +
 +#include <stdlib.h>
 +
 +int main ( void )
 +{
 +  char *env;
 +  env = getenv ("USER");
 +  if (env!=NULL) {
 +    printf ("Your Username is: %s\n", env);
 +  }
 +  return 0;
 +}
 +</code>
 +
 +==== Output ====
 +
 +    user@host:~$ ./getenv 
 +    Your Username is: code-reference.com
  
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c/stdlib.h/getenv.txt · Last modified: 2013/01/22 22:02 (external edit)

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