求出 小弟初学

hzy12359

Write a shell script to simulate a simple calculator. Sample output is as follows.
建一个脚本 简单的计算器 运行如下
tsaiy:/./calculator
enter the first number
6
enter the second number
8
enter operand
*
the result is 48
tsaiy:/./calculator
enter the first number
50
enter the second number
25
enter operand
/
the result is 2

lkk2003rty

做作业？

hzy12359

不是呀 练习题

lkk2003rty

1. #!/bin/bash
   
2. echo "enter the first number"
   
3. read a
   
4. echo "enter the second number"
   
5. read b
   
6. echo "enter operand"
   
7. read oper
   
8. case "$oper" in
   
9. "+" )
   
10.     ((b=a+b))
    
11.    echo "the result is $b"
    
12.    ;;
    
13. "-" )
    
14.     ((b=a-b))
    
15.     echo "the result is $b"
    
16.     ;;
    
17. "*" )
    
18.     ((b=a*b))
    
19.     echo "the result is $b"
    
20.     ;;
    
21. "/" )
    
22.     if [ "$b" -eq "0" ]
    
23.     then
    
24.         echo "Error"
    
25.     else
    
26.         ((b=a/b))
    
27.         echo "the result is $b"
    
28.     fi
    
29.     ;;
    
30. *   )
    
31.     echo "Error"
    
32.     ;;
    
33. esac

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回复 3# hzy12359

wtuter

回复 1# hzy12359


    好好做作业吧，出来了有用，别浪费了学习的机会