#!/bin/bash read -p "input string > " str if [ -z "$str " ]
then echo "str是空"
else echo "str非空"
fi
#!/bin/bash read -p "input integer > " num if [ $(( num % 2 )) -eq 1 ]
then echo "num是奇数"
else echo "num是偶数"
fi
#!/bin/bash read -p "input integer > " num if [ $(( num % 2 )) -eq 0 ]
then echo "num是偶数"
else echo "num是奇数"
fi
#!/bin/bash read -p "input integer > " num if [ $num -gt 0 ]
then echo "num是正数"
else echo "num不是正数"
fi
#!/bin/bash read -p "input integer > " num if [ $num -lt 0 ]
then echo "num是负数"
else echo "num不是负数"
fi
#!/bin/bash
read -p "input str1 > " str1
read -p "input str2 > " str2if [ -n "$str1 " -a -n "$str2 " ]
then if [ "$str1 " \ > "$str2 " ] then echo "str1 > str2" elif [ "$str1 " \ < "$str2 " ] then echo "str1 < str2" else echo "str1 = str2" fi
else echo "请不要输出空字符串"
fi #!/bin/bash
read -p "input score > " scoreif [ $score -ge 0 -a $score -le 100 ]
then echo "score合法"
else echo "score非法"
fi
#!/bin/bash
read -p "input score > " scoreif [ $score -ge 60 ]
then echo "score及格"
else echo "score不及格"
fi
#!/bin/bash
read -p "input year > " yearif (( ( year% 4 == 0 && year% 100 != 0 ) || ( year% 400 == 0 )) )
then echo "闰年"
else echo "平年"
fi #!/bin/bash read -p "input file > " file if [ -f $file ]
then echo "这是普通文件"
else echo "文件不存在或它不是普通文件"
fi
#!/bin/bash read -p "input file > " file if [ -d $file ]
then echo "这是目录"
else echo "文件不存在或它不是目录"
fi
#!/bin/bash read -p "input file > " file if [ -r $file ]
then echo "文件可读"
else echo "文件不可读"
fi if [ -w $file ]
then echo "文件可写"
else echo "文件不可写"
fi if [ -x $file ]
then echo "文件可执行"
else echo "文件不可执行"
fi
)
