To print diamond asterisk pattern based on inputs


Login or Register for Dates, Times and to Reply

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting To print diamond asterisk pattern based on inputs
# 1  
To print diamond asterisk pattern based on inputs

I have to print the number of stars that increases on each line from the minimum number until it reaches the maximum number, and then decreases until it goes back to the minimum number. After printing out the lines of stars, it should also print the total number of stars printed.

I have tried using shell scripting and worked. But is there any other simplified and generic way to achieve this

Code:
echo "enter the mininum number "
read min
echo "enter the maximum number "
read max
for (( i=$min;i<=$max;i++))
do
   for (( j=$max;j>=i;j-- ))
   do
   echo -n " "
   done
   for (( c=1;c<=i;c++ ))
   do
   echo -n " *"
   sum=`expr $sum + 1`
   done
echo ""
done
d_max=`expr $max - 1`
for (( i=$d_max;i>=$min;i--))
do
   for (( j=i;j<=$d_max;j++ ))
   do
   if [ $j -eq $d_max ]
   then
   echo -n " "
   fi
   echo -n " "
   done
   for (( c=1;c<=i;c++ ))
   do
   echo -n " *"
   sum=`expr $sum + 1`
   done
echo ""
done
echo "Total No. : "  $sum

Exepcted output
Code:
 

      *
     * *
    * * *
   * * * *
  * * * * *
   * * * *
    * * *
     * *
      *

# 2  
This User Gave Thanks to RudiC For This Post:
# 3  
Ancient books might tell you to
Code:
sum=`expr $sum + 1`

But only the old Bourne shell needs the external expr command for math ops.
Recent standard shells have
Code:
sum=$((sum + 1))

And, since you use (( )) with for, you can even try
Code:
((sum += 1))

or
Code:
((sum++))

# 4  
Code:
echo "enter the mininum number "
read min
echo "enter the maximum number "
read max
stars=$(printf '%*s' $(( $max * 2 )) '')
stars=${stars//  / *}
cnt=0;
for (( i=$min;i<=$max;i++)); do printf "%*s%s\n" $((( max - i + 1 ))) " " "${stars:1:$((( $i * 2 )))}" ; (( cnt = cnt + i )) ; done
for (( i=$max-1;i>=$min;i--)); do printf "%*s%s\n" $((( max - i + 1 ))) " " "${stars:1:$((( $i * 2 )))}"; (( cnt = cnt + i )) ;done
echo Total: $cnt


Last edited by rdrtx1; 08-08-2019 at 12:32 PM.. Reason: including total count.
# 5  
Fully dash/POSIX shell only compliant.
Uses terminal escape codes for fun.
Code:
#!/usr/local/bin/dash
# DIAMOND.sh
# POSIX compliant, with no input error checking.
# Using terminal escape codes just for fun.

echo "Enter minimum value:"
read -r MIN
echo "Enter maximum value:"
read -r MAX
printf "\033c\n"
STRNG="* "
COUNT=1
STAR="${STRNG}"
HORIZ=34
VERT=4
while [ ${COUNT} -lt ${MIN} ]
do
    STRNG="${STRNG}"'* '
    COUNT=$(( COUNT + 1 ))
done

STAR="${STRNG}"
COUNT=$(( MAX + 1 ))
while [ ${COUNT} -ge ${MIN} ]
do
    printf "%b" "\033["${VERT}";"${HORIZ}"f${STAR}"
    STAR="${STAR}${STRNG}"
    COUNT=$(( COUNT - 1 ))
    HORIZ=$(( HORIZ - MIN ))
    VERT=$(( VERT + 1 ))
done
HORIZ=34
VERT=$(( VERT + MAX - MIN ))
STAR="${STRNG}"
COUNT=$(( MAX + 1 ))
while [ ${COUNT} -ge ${MIN} ]
do
    printf "%b" "\033["${VERT}";"${HORIZ}"f${STAR}"
    STAR="${STAR}${STRNG}"
    COUNT=$(( COUNT - 1 ))
    HORIZ=$(( HORIZ - MIN ))
    VERT=$(( VERT - 1 ))
done
printf "\033[H"

Result OSX 10.14.3, default bash terminal calling dash, values given, 3 MIN, 10 MAX:
Code:
AMIGA:amiga~/Desktop/Code/Shell> 


                                 * * * 
                              * * * * * * 
                           * * * * * * * * * 
                        * * * * * * * * * * * * 
                     * * * * * * * * * * * * * * * 
                  * * * * * * * * * * * * * * * * * * 
               * * * * * * * * * * * * * * * * * * * * * 
            * * * * * * * * * * * * * * * * * * * * * * * * 
         * * * * * * * * * * * * * * * * * * * * * * * * * * * 
            * * * * * * * * * * * * * * * * * * * * * * * * 
               * * * * * * * * * * * * * * * * * * * * * 
                  * * * * * * * * * * * * * * * * * * 
                     * * * * * * * * * * * * * * * 
                        * * * * * * * * * * * * 
                           * * * * * * * * * 
                              * * * * * * 
                                 * * *

# 6  
Code:
#!/bin/bash

MIN=1
MAX=10
STARS=0

S=$(printf '%*s' "$((MAX*2))" '')
D=${S//  / *}

for ((N=MIN; N < (MAX*2); N++ && (STARS += W)))
do
        [ "$N" -gt "$MAX" ] && W=$(((MAX*2)-N)) || W="$N"
        [ "$W" -lt "$MIN" ] && break;
        echo "${S:0:$((MAX-W))}${D:0:$((W*2))}"
done

echo "Total stars: $STARS"

Code:
          *
         * *
        * * *
       * * * *
      * * * * *
     * * * * * *
    * * * * * * *
   * * * * * * * *
  * * * * * * * * *
 * * * * * * * * * *
  * * * * * * * * *
   * * * * * * * *
    * * * * * * *
     * * * * * *
      * * * * *
       * * * *
        * * *
         * *
          *
Total stars: 100

These 2 Users Gave Thanks to Corona688 For This Post:
# 7  
Love that solution Corona688 but the MIN and MAX tests and the loop break feel awkward.

Bash makes it hard without an abs() function, I was forced to use ${A#-} in it's place, but, in my opinion this is an improvement:

Code:
MIN=1
MAX=10

S=$(printf '%*s' "$((MAX*2))" '')
D=${S//  / *}

for((N=MIN; N <= (MAX*2-MIN); N++ && (STARS +=W)))
do
    ((A=N-MAX))
    ((W=MAX-${A#-}))
    echo "${S:0:$((MAX-W))}${D:0:$((W*2))}"
done
echo "Total stars: $STARS"

These 3 Users Gave Thanks to Chubler_XL For This Post:
Login or Register for Dates, Times and to Reply

Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

Test Your Knowledge in Computers #119
Difficulty: Easy
The Single UNIX Specification (SUS) is a standard for Unix systems to qualify and have permission to use the UNIX certification mark.
True or False?

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Find matched pattern and print all based on certain conditions

Hi, I am trying to extract data based on certain conditions. My sample input file as below:- lnc-2:1 OnePiece tra_law 500 688 1 . . g_id "R792.8417"# tra_law_id "R792.8417.1"# g_line "2.711647"# KM "8.723820"# lnc-2:1 OnePiece room 500 510 1 . . g_id "R792.8417"# tra_law_id "R792.8417.1"#... (7 Replies)
Discussion started by: bunny_merah19
7 Replies

2. UNIX for Beginners Questions & Answers

Reading a file line by line and print required lines based on pattern

Hi All, i want to write a shell script read below file line by line and want to exclude the lines which contains empty value for MOUNTPOINT field. i am using centos 7 Operating system. want to read below file. # cat /tmp/d5 NAME="/dev/sda" TYPE="disk" SIZE="60G" OWNER="root"... (4 Replies)
Discussion started by: balu1234
4 Replies

3. Shell Programming and Scripting

Print asterisk instead of password (Bash)

OS : RHEL 6.5 Shell : Bash With the following bash shell script, when I enter password, it won't be printed in the screen. But, I would like Asterisk character to be printed instead of the real characters. Any idea how ? $ cat pass.sh echo "Enter the username" read username echo... (3 Replies)
Discussion started by: John K
3 Replies

4. Shell Programming and Scripting

Print column based on pattern

Hi all, how print on columns when contain un pattern specific, e.g. $cat file1 3234 234 2323 number1 number2 number3 123 242 124 124 number2 324 424 543 626 number1 3463 234 534 345 number3 6756 345 2352 334 345 234 need output file1 way (2 Replies)
Discussion started by: aav1307
2 Replies

5. Shell Programming and Scripting

Print Unknown Number of User Inputs in awk

Hello, I am new to awk and I am trying to figure out how to print an output based on user input. For example: ubuntu:~/scripts$ steps="step1, step2, step3" ubuntu:~/scripts$ echo $steps step1, step2, step3 I am playing around and I got this pattern that I want: ... (3 Replies)
Discussion started by: tattoostreet
3 Replies

6. Shell Programming and Scripting

print the whole row in awk based on matched pattern

Hi, I need some help on how to print the whole data for unmatched pattern. i have 2 different files that need to be checked and print out the unmatched patterns into a new file. My sample data as follows:- File1.txt Id Num Activity Class Type 309 1.1 ... (5 Replies)
Discussion started by: redse171
5 Replies

7. Shell Programming and Scripting

grep based on pattern in a line and print the column before that

$ cat file.log Message Number = : Sending message 10:50:16^|^reqhdr.dummyid^=^02^|^reqhdr.timezone^=^GMT+05:30^|^DUMMYREQUEST^=^BH||||||||||||||||||$BD|OL|C|V||DummyAcctNo|02||24/12/2011|ST_DDM|DDM||||||||reqUUID110612105016$BT||||||||||||||||||$] Length I have the above line in the... (4 Replies)
Discussion started by: kalidass
4 Replies

8. UNIX for Dummies Questions & Answers

print multiple lines from text file based on pattern list

I have a text file with a list of items/patterns: ConsensusfromCGX_alldays_trimmedcollapsedfilteredreadscontiglist(229095contigs)contig12238 ConsensusfromCGX_alldays_trimmedcollapsedfilteredreadscontiglist(229095contigs)contig34624... (1 Reply)
Discussion started by: Oyster
1 Replies

9. Shell Programming and Scripting

Print a pattern between the xml tags based on a search pattern

Hi all, I am trying to extract the values ( text between the xml tags) based on the Order Number. here is the sample input <?xml version="1.0" encoding="UTF-8"?> <NJCustomer> <Header> <MessageIdentifier>Y504173382</MessageIdentifier> ... (13 Replies)
Discussion started by: oky
13 Replies

10. Shell Programming and Scripting

how to print asterisk without its wild card functionality

I have three cron entries in a file /cron_entries as 15 * * * * /bin/hourjobs > /tmp/hrjob.log 2>&1 .................. .................... I am trying to read this file in for loop using code below: cron=`cat /cron_entries` for line in $cron do printf... (4 Replies)
Discussion started by: sudh
4 Replies

Featured Tech Videos