How to set an environment variable when using system() to execute a command?

Question

I\'m writing a C program on Linux and need to execute a command with system(), and need to set an environment variable when executing that command, but I don\'t

Answer 1

This should work:

#include "stdio.h"

int main()
{
    system("EXAMPLE=test env|grep EXAMPLE");
}

outputs

EXAMPLE=test