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#!/bin/bash
# max.sh: Maximum of two integers.
E_PARAM_ERR=250 # If less than 2 params passed to function.
EQUAL=251 # Return value if both params equal.
# Error values out of range of any
#+ params that might be fed to the function.
max2 () # Returns larger of two numbers.
{ # Note: numbers compared must be less than 250.
if [ -z "$2" ]
then
return $E_PARAM_ERR
fi
if [ "$1" -eq "$2" ]
then
return $EQUAL
else
if [ "$1" -gt "$2" ]
then
return $1
else
return $2
fi
fi
}
max2 33 34
return_val=$?
if [ "$return_val" -eq $E_PARAM_ERR ]
then
echo "Need to pass two parameters to the function."
elif [ "$return_val" -eq $EQUAL ]
then
echo "The two numbers are equal."
else
echo "The larger of the two numbers is $return_val."
fi
exit 0
# Exercise (easy):
# ---------------
# Convert this to an interactive script,
#+ that is, have the script ask for input (two numbers).
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