完善程序，以实现比较两个数大小 #!/bin/sh echo "Enter the first integer:" read first echo "Enter the second integer:" read second if （1） then echo "$first is greater than $second" elif （2） then echo "$first is less than $second" else echo "$first is equal to $second" fi

#!/bin/sh

echo "Enter the first integer:"
read first

echo "Enter the second integer:"
read second

if [ "$first" -gt "$second" ]; then
echo "$first is greater than $second"
elif [ "$first" -lt "$second" ]; then
echo "$first is less than $second"
else
echo "$first is equal to $second"
fi

解释说明：
- "-gt" 表示大于
- "-lt" 表示小于
- "-eq" 表示等于
- "$first" 和 "$second" 表示变量 first 和 second 的值