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µ«ÏÖÔÚÓöµ½Ò»¸öÂ鷳ʣ¬ÎÒÏëÓÃint getCmd(char **argu)Õâ¸öº¯ÊýÀ´¶ÁÈ¡Óû§ÊäÈëµÄÐÅÏ¢£¬intÓÃÓÚ·µ»Ø³É¹¦»òÕßʧ°Ü
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ÀýÈ磬 ÎÒÔÚcmdÏÂÊäÈëÁËcp ./huv ./hxx/hc.f
ÄÇôÔÚÕâ¸öº¯ÊýÀïÓ¦¸Ã»ñµÃÈçÏÂÖ´ÐÐЧ¹û
argu[0] == "cp"
argu[1] == "./huv"
argu[2] == "./hxx/hc.f"
argu[3] == NULL

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ʹÓÃÁËscanf("%s %s %s", argv[0], argv[1], argv[2]);

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#define type_prompt() (printf("user_type# "))
int getCmd(char **argu)
{
    type_prompt();
    char argv[4][128];
    scanf("%s %s %s", argv[0], argv[1], argv[2]);
    *argv[3] = NULL;

  /*ʣϵľÍÊÇÈçºÎ°ÑargvÀïÃæµÄÄÚÈݸ³Öµ¸øarguÁË£¬¸÷λ¿´¿´ÈçºÎ×ö£¿£¿*/
  ...
}
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