Write a shell program..help guys..

Question

write a shell program that adds the 1st and 3rd arguments and multiplies the 2nd and the 4th arguments. the program also adds the product and sum. And subtract the 5th argument from the result.

sample run

$./prog 35 11 75 18 37

35 and 75 (add) --- A

11 and 18 (multiply) -----B

then A and B (add)

thanx.

Answer 1

Try

#!/bin/bash

let "SUM=$1 + $3"

let "PRODUCT=$2 * $4"

let "SUM=SUM + PRODUCT"

let "DIFFERENCE = SUM - $5"

echo $DIFFERENCE

Answer 2

Try following code; it will give you desired results:

A=`expr $1 + $3`

B=`expr $2 \* $4`

Part1=`expr $A + $B`

Result=`expr $Part1 - $5`

echo "Result is: $Result"