Question

我必须编写一个bash脚本，用户从学生和成绩列表中输入名称，然后显示该名称和成绩。这是一个二进制搜索，我必须首先对列表进行排序，并且必须使用中间点来检查名称。我写了这段代码，但是无论我输入什么名字，它都只会显示相同的成绩，如果名称不在列表中，它将显示姓名和固定成绩。

sort -o sorted.dat sort.dat
((count = 0))
while read names[$count]; do
((count++))
done<sorted.dat


# Store the names and grades into arrays
names=( $( cut -d: -f1 name.txt ) )
grades=( $( cut -d: -f2 name.txt ) )

# Prompt user for a name
echo "Type the student's name (use proper capitalization!), followed by [ENTER]:"

# Read the user's response
read names

length=${#names[@]}
start=0
end=$((length - 1))
match=0

while [[ $start -le $end ]]; do
     middle=$((start + ((end - start)/2)))
     middle_name=${names[$middle]}
     if [[  $middle_name -gt $name ]]; then
         end=$((middle-1))
         echo "${name}'s grade is a(n): ${grades[$name]}."
     elif [[ $middle_name -lt $name ]]; then
         start=$((middle+1))
         echo "${name}'s grade is a(n): ${grades[$name]}."
     else
         # A match was found
         match=1
         echo "${name}'s grade is a(n): ${grades[$middle_name]}."
         break
     fi
done

# Check if a match was found
if [[ $match = 0 ]]; then
    echo "Couldn't find that student..."
fi

Bash脚本显示相同等级

0 个答案: