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C Exercises: Get the environment string

C Variable Type : Exercise-9 with Solution

Write a C program to get the environment string.

Sample Solution:

C Code:

#include<stdio.h>
#include<stdlib.h>

int main ()
	{
		char * PathPtr;
		
		PathPtr = getenv ("PATH");

		if (PathPtr!=NULL)
			printf ("\nThe set path is: %s\n\n",PathPtr);

		return 0;
    }

Sample Output:

The set path is: /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games 

Flowchart:

C Exercises Flowchart: Get the environment string

C Programming Code Editor:

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C Programming: Tips of the Day

How I can print to stderr in C?

The syntax is almost the same as printf. With printf you give the string format and its contents i.e.:

printf("my %s has %d chars\n", "string format", 30);

With fprintf it is the same, except now you are also specifying the place to print to:

File *myFile;
...
fprintf( myFile, "my %s has %d chars\n", "string format", 30);

Or in your case:

fprintf( stderr, "my %s has %d chars\n", "string format", 30);

Ref : https://bit.ly/3v5U8Zq