企业shell编程基础问题解决实践

1.请用shell或Python编写一个正方形(oldboy4.sh)，接收用户输入的数字。
例如：用＋号实现

[email protected]:~/script$ vim oldboy_squarel.sh
[email protected]:~/script$ ./oldboy_squarel.sh
Please Enter a number:4
++++++++
++++++++
++++++++
++++++++
[email protected]:~/script$ cat oldboy_squarel.sh
#/biin/bash

read -p "Please Enter a number:" num

for ((i=0;i<$num;i++))
{
    for((j=0;j<$num*2;j++))
    {
        echo -n "+"
    }
    echo
}

2.请用shell或Python编写一个等腰三角形(oldboy2_triangle.sh)，接收用户输入的数字。
例如：用*号实现

[email protected]:~/script$ vim oldboy2_triangle.sh
[email protected]:~/script$ ./oldboy2_triangle.sh
Please Enter the num:3
   *
  ***
 *****
[email protected]:~/script$ ./oldboy2_triangle.sh
Please Enter the num:5
     *
    ***
   *****
  *******
 *********
[email protected]:~/script$ cat oldboy2_triangle.sh
#/bin/bash

read -p "Please Enter the num:" num

for ((i=0;i<$num;i++))
{
    for ((j=0;j<$num-$i;j++))
    {
        echo -n " "
    }
    for ((k=0;k<$i*2+1;k++))
    {
        echo -n "*"
    }
    echo

}

原题来源：http://oldboy.blog.51cto.com/2561410/1718607