Unix

[Diggler]

if you know how to program in UNIX I NEED HEEEELLLLPPPPPP! here are some of the programs I wrote that arent working. Can you guide my in what I did wrong

1. Create a program that will ask the user if they want to add, subtract, multiply or divide two user inputted numbers. Then give the response as follows:

The sum of number1 and number 2 is: Answer
The difference of number1 and number2 is: Answer
The product of number1 and number2 is: Answer
The quotient of Number1 and Number2 is: Answer

#!/bin/sh
echo “Do you want to add, subtract, multiply, or divide”
read choice
if [ $choice = add]
then
echo “Enter a Number”
read num1
echo “enter another number”
read num2
let x=$num1 + $num2
echo $x
elif [ $choice = subtract ]
then
echo “Enter a Number”
read num1
echo “enter another number”
read num2
let x=$num1 - $num2
echo $x
elif [ $choice = multiply ]
then
echo “Enter a Number”
read num1
echo “enter another number”
read num2
let x=$num1 \* $num2
echo $x
elif [ $choice = divide ]
then
echo “Enter a Number”
read num1
echo “enter another number”
read num2
elif [$num2 = 0]
then
echo “division by zero error will occur.”
Echo “choose another number”
Read num2
let x=$num1 \ $num2
echo $x
else [$choice = quite]
then
echo “you are done”
fi

on this one this is as far as I got now im stumped

4. Write a program that will allow a user to input as many numbers as the user wants (use 999 as the choice that ends the user input). The program will then respond:
Highest Number: Answer
Lowest Number: Answer
Sum of the numbers: Answer
Average of the numbers: Answer

#!/bin/sh
until [ count=999 ]
do
echo "Enter a number"
read num1
echo "Enter another number"
read num2
let count=count + 1

last but not least


6. Write a program that will allow a user to type in a number, then the number will either count up to the number provided by the user or count down from that number. In addition, create a menu that will let the user choose which counter they wish to use. In both cases that counter will either count down to 0, or start counting from 0
echo “choose to count up or down”
read choice
echo “Please enter a number”
read num
if [ choice = up ]
then
count=0
until [ $count = $num ]
do
echo $count
let count=counter + 1
echo $count
done
else
count=$num
until [ $count = 0 ]
do
echo $count
let count=count – 1
done


thx for n e help

[mattg2k4]

I'm assuming this is a shell script of some sort? I don't know much about those, but even I could try and help if you told us what problems you are having with these homework problems.

[Diggler]

they dont show any results, it is a shell sript. i cant tell whether or not there is a problem and if there is it usually says line"##" error ## meaning number 1 or 2 or 39

[shaticus]

I havent done much with shell scripting, but for number 4 you want to do something like this

#!/bin/sh
echo "Enter a number"
read num1

//sets all variable to first number - since this is the first number it will be the highest and lowest so far.
highest = num1
total = num1
smallest = num1

until [ count=999 ]
do
echo "Enter a number"
read num1
//if number entered is greater than the highest so far set that number to highest.
if[num1 > highest]
highest = num1

//if number entered is less than the highest so far set that number to lowest.
if[num1 < lowest]
lowest = num1

//keeps track of all numbers so far
total = total + num1
let count=count + 1

//outside of loop output your text and answer
Highest Number: highest
Lowest Number: lowest
Sum of the numbers: total
Average of the numbers: total / count

[Diggler]

Originally Posted by shaticus I havent done much with shell scripting, but for number 4 you want to do something like this #!/bin/sh echo "Enter a number" read num1 //sets all variable to first number - since this is the first number it will be the highest and lowest so far. highest = num1 total = num1 smallest = num1 until [ count=999 ] do echo "Enter a number" read num1 //if number entered is greater than the highest so far set that number to highest. if[num1 > highest] highest = num1 //if number entered is less than the highest so far set that number to lowest. if[num1 < lowest] lowest = num1 //keeps track of all numbers so far total = total + num1 let count=count + 1 //outside of loop output your text and answer Highest Number: highest Lowest Number: lowest Sum of the numbers: total Average of the numbers: total / count

u made that look too east lol thx I was totally wrong on that approach