Shulou(Shulou.com)06/01 Report--

# include "stdlib.h" # include "stdio.h" void main () {char s; while (1) {printf ("input cmd:"); scanf ("% s", s); system (s);}}

Enter cmd1 | pwd:cmd2 refers to the line

Enter cmd1&&cmd2:cmd1 to refer to the line, cmd2 to execute

Enter cmd1&cmd2:cmd2 to execute, and cmd1 refers to line and hang

Enter cmd1 & cmd2:cmd1 to execute, error report, cmd2 execute

Enter cmd1;cmd2:cmd1 to refer to the line, cmd2 to execute

Reference:

Http://blog.csdn.net/hitwangpeng/article/details/45716821

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