Question

How to use getenv to get the environment variables value in C

Answer 1

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

// Windows

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

    if (p)
        printf("PATH = %s\n", p);
}



/*
run:

PATH = C:\Program Files\Microsoft\jdk-11.0.12.7...;C:\Program Files\NVIDIA GPU Computing...

*/

 

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Answer 2

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

// Linux
 
int main(void)
{
    char* p = getenv("PATH");
 
    if (p)
        printf("PATH = %s\n", p);
}
 
 
 
/*
run:
 
PATH = /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin

*/

 

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