求助： set i=$<

wangyl86

有这样的一段shell小程序：
＃！／bin/bash   #原文是＃!/usr/bin/csh
echo "lease enter a number.."
set i=$<
if ( $ i< 20 )then
echo "$ i is less than 20"
else if ( $ i==20 ) then
echo "$ i is equal to 20"
else
echo "$ i is greater than 20"
endif
这段小程序不能执行，显示执行结果如下：
bash: ./a: cannot execute binary file
还有 set i=$ < 单独也不能执行 其执行结果如下：bash: syntax error near unexpected token `newline｀
恭请高手指点迷津，先行谢过！！

GGMM

改成/bin/bash的话要用下面的写法：

1. 
   
2. #!/bin/bash
   
3. echo "Please enter a number.."
   
4. read i
   
5. if [ $i -lt 20 ]; then
   
6.     echo "$i is less than 20"
   
7. elif [ $i -eq 20 ]; then
   
8.     echo "$i is equal to 20"
   
9. else
   
10.     echo "$i is greater than 20"
    
11. fi
    

复制代码

Iambitious

我还在纳闷呢，写得什么语句阿，原来是csh