通过bash，输入含有（）左右括号的字符串

#include<stdio.h>
#include<string.h>

int main( int argc, char* argv[] )
{
    puts( argv[1] );
    return 0;
}

输入样例：（）www
bash: 未预期的符号 `www' 附近有语法错误

---

可以将包含特殊字符的参数用单引号引起来，或者通过反斜杠转意：

[root@web ~]# ls ()
-bash: syntax error near unexpected token `('
[root@web ~]# ls '()'
ls: cannot access (): No such file or directory
[root@web ~]# ls \(\)
ls: cannot access (): No such file or directory