Use for loops to construct a program that displays a pyramid of numbers on the screen.?

Question

Hints
You may nest two inner loops, one to print spaces and one to print numbers (0-9), inside an outer loop that steps down the screen from line to line.
ask user to enter any number from 0 to 9. if he enter 3 out put will be.
*****1
****2 2
***3 3 3
**4 4 4 4
In the above sample there will no'*' in real and it is not appear in screan . it will write only for submitting sample.if I do not write * prew of sample is not correct in appearence.


PLEASE GIVE COMPLETE SOLUTION. THANKS

Answer 1

I wrote my solution in perl. It should easily translate to other computer languages. C would be a good bet. Unfortunately, it didn't format as nice when I copied it into the answer box. Like the author of the question, I used an asterisk in place of the space.

#!/usr/bin/perl
#
# A Yahoo Answers programming answer
# This program prints a pyramid with each line numbered
# with the number of blocks in each layer.
#

print "Enter a number between 1 and 9. ";

$NUMBER = (); # Read input from standard input

chomp ($NUMBER); # Get rid of the trailing carriage return

print "\nCreating a Pyramid $NUMBER rows high\n\n";

$ROW_NUM = 1; # $ROW_NUM will count the number of rows

# The outer loop sets the number of lines to print

for ($LINES = $NUMBER; $LINES > 0; $LINES--) {

# The inner loops print the leading spaces followed
# by the $ROW_NUM row numbers.

# Print the leading spaces in the line

for ($i = $LINES; $i > 1 ; $i--) {
print "*"; # Replace the '*' with a space if you'd like.
}

# Print the Row Number $ROW_NUM times.
# Note that I print $ROW_NUM followed by a space for
# a nice evenly shaped pyramid.

for ($j = $ROW_NUM; $j > 0; $j--) {
print "$ROW_NUM "; # A space follows $ROW_NUM
}

print "\n"; # Print a newline to start the next line.

$ROW_NUM++; # Increment the row number counter.
}