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
xiaorui@xiaorui:~/script$ vim oldboy_squarel.sh xiaorui@xiaorui:~/script$ ./oldboy_squarel.sh Please Enter a number:4 ++++++++ ++++++++ ++++++++ ++++++++ xiaorui@xiaorui:~/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
xiaorui@xiaorui:~/script$ vim oldboy2_triangle.sh xiaorui@xiaorui:~/script$ ./oldboy2_triangle.sh Please Enter the num:3 * *** ***** xiaorui@xiaorui:~/script$ ./oldboy2_triangle.sh Please Enter the num:5 * *** ***** ******* ********* xiaorui@xiaorui:~/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 }
3.请用shell或Python编写一个画直角梯形程序(oldboy3.sh)，接收用户输入的参数n，m
read读入：
xiaorui@xiaorui:~/script$ ./oldboy3.sh Please Enter the min num:3 Please Enter the max num:8 *** **** ***** ****** ******* ******** xiaorui@xiaorui:~/script$ cat oldboy3.sh #/bin/bash read -p "Please Enter the min num:" num1 read -p "Please Enter the max num:" num2 for ((i=0;i<$num2-$num1+1;i++)) { for ((j=0;j<$num1+$i;j++)) { echo -n "*" } echo }
命令行直接接参数：
xiaorui@xiaorui:~/script$ ./oldboy3.sh 2 5
**
***
****
*****
xiaorui@xiaorui:~/script$ cat oldboy3.sh
#/bin/bash
num1=$1
num2=$2
for ((i=0;i<$num2-$num1+1;i++))
{
for ((j=0;j<$num1+$i;j++))
{
echo -n "*"
}
echo
}