C囂冱getenv()痕方?函誼桟廠延楚坪否
屢購痕方?putenv, setenv, unsetenv
遊猟周?#include <stdlib.h>
協吶痕方?char * getenv(const char *name);
痕方傍苧?getenv()喘栖函誼歌方name 桟廠延楚議坪否. 歌方name 葎桟廠延楚議兆各, 泌惚乎延楚贋壓夸氏卦指峺?乎坪否議峺寞. 桟廠延楚議鯉塀葎name?value.
卦指峙?峇佩撹孔夸卦指峺?乎坪否議峺寞, 孀音欺憲栽議桟廠延楚兆各夸卦指NULL.
袈箭
#include <stdlib.h>
main()
{
char *p;
if((p = getenv("USER")))
printf("USER = %s\n", p);
}
峇佩?
USER = root
遊猟周?#include <stdlib.h>
協吶痕方?char * getenv(const char *name);
痕方傍苧?getenv()喘栖函誼歌方name 桟廠延楚議坪否. 歌方name 葎桟廠延楚議兆各, 泌惚乎延楚贋壓夸氏卦指峺?乎坪否議峺寞. 桟廠延楚議鯉塀葎name?value.
卦指峙?峇佩撹孔夸卦指峺?乎坪否議峺寞, 孀音欺憲栽議桟廠延楚兆各夸卦指NULL.
袈箭
#include <stdlib.h>
main()
{
char *p;
if((p = getenv("USER")))
printf("USER = %s\n", p);
}
峇佩?
USER = root