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  • shell函数应用

    阶乘计算

      版本一:

    [root@centos17 shell]# sh -v factorial.sh 
    #!/bin/bash
    factorial() {
    factorial1=1
    for((i=1;i<=5;i++));do
    	factorial1=$((factorial1*i))
    done
    echo "5的阶乘是:$factorial1"
    }
    
    factorial
    5的阶乘是:120
    [root@centos17 shell]# 
    

      版本二:

    [root@centos17 shell]# sh -v factorial.sh
    #!/bin/bash
    factorial() {
    factorial1=1
    for((i=1;i<=$num;i++));do
    	factorial1=$((factorial1*i))
    done
    echo "$num的阶乘是:$factorial1"
    }
    num=5
    factorial
    5的阶乘是:120
    [root@centos17 shell]# 
    

      版本三:

    [root@centos17 shell]# sh -v factorial.sh 5
    #!/bin/bash
    factorial() {
    factorial1=1
    for((i=1;i<=$1;i++));do
    	factorial1=$((factorial1*i))
    done
    echo "$1的阶乘是:$factorial1"
    }
    factorial $1
    5的阶乘是:120
    [root@centos17 shell]# 
    

      版本四:

    [root@centos17 shell]# sh -v factorial.sh 5 8 10
    #!/bin/bash
    factorial() {
    factorial1=1
    for((i=1;i<=$1;i++));do
    	factorial1=$((factorial1*i))
    done
    echo "$1的阶乘是:$factorial1"
    }
    factorial $1
    5的阶乘是:120
    factorial $2
    8的阶乘是:40320
    factorial $3
    10的阶乘是:3628800
    [root@centos17 shell]# 
    

      

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  • 原文地址:https://www.cnblogs.com/xiaofeng666/p/13771110.html
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