Nested loop Character box

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04-25-2012
golf_fanatic

Nested loop Character box

Hi i need a little help on a program im working on it ask the user for a keyboard character and a number of rows and columns
to look like this

RRRRR
R___R
R___R
R___R
RRRRR
and also this in another program
rrrrrr
rrrrrr
rrrrrr
rrrrrr
I currently have
<html><body>
<script type="text/javascript">

// Declare variables and constants
var userInputText; // user input to go
var numRow; // number of the rows
var NumCol; // number of the columns
var ES = ""; // empty string

userInputText = prompt("Enter a keyboard character",ES);
numRow = prompt("Enter the number of rows",ES);
NumCol = prompt("Enter the number of columns",ES);

//need a nested loop to draw the character box

</script>
</body>
</html>

if any one can help me finish this program i would appreciate it
04-25-2012
golf_fanatic

I found this if some one could help me covert it to fit into my script above id appreciate it

void printsquare ( int width, int height, char c )
{
int i;
int j;

for ( i = 0; i < width; i++ )
putchar ( c );
putchar ( '\n' );
for ( i = 1; i < height; i++ ) {
putchar ( c );
for ( j = 1; j < width - 1; j++ )
putchar ( ' ' );
printf ( "%c\n", c );
}
for ( i = 0; i < width; i++ )
putchar ( c );
putchar ( '\n' );
}

int main ( void )
{
printsquare ( 5, 5, '*' );

return 0;
}
04-25-2012
laserlight

Is this supposed to be C or Javascript?
04-25-2012
golf_fanatic

Quote:

Originally Posted by laserlight

Is this supposed to be C or Javascript?

javascript
04-25-2012
laserlight

Right. Thread moved to Tech Board.

Anyway, instead of just finding code online and trying to convert it, why don't you spend some effort to understand the algorithm and then implement it in Javascript?
04-25-2012
golf_fanatic

Quote:

Originally Posted by laserlight

Right. Thread moved to Tech Board.

Anyway, instead of just finding code online and trying to convert it, why don't you spend some effort to understand the algorithm and then implement it in Javascript?

im not trying to become a programmer i just needed some help converting it i understand simple javascript this character box is just very complexed and since it looked so similar to javascript i thought someone could help me fix it real quick

srry but this was the closest site i found to getting help with javascript
04-25-2012
laserlight

Quote:

Originally Posted by golf_fanatic

im not trying to become a programmer

That is besides the point. Pretty much all students learn mathematics at some level, but obviously "I'm not trying to become a professional mathematician" is a lame excuse for a student trying to avoid doing maths homework himself/herself.

Quote:

Originally Posted by golf_fanatic

i just needed some help converting it i understand simple javascript this character box is just very complexed and since it was similiar to c i thought someone could help me fix it real quick

Is the code that you are trying to write supposed to be C or Javascript? Is this conversion the objective of your assignment?

I mean, I don't need the C code to implement the Javascript code, and I don't need the Javascript code to implement the C code, so really, the "conversion" is not important, unless that is the objective of the assignment. I suspect that the objective of the assignment is to get you to come up with an algorithm to solve this problem, then implement that algorithm. To this end you could look at existing code in another programming language that does something similiar, but you should seek to understand, not convert.

Quote:

Originally Posted by golf_fanatic

srry but this was the closest site i found to getting help with javascript

Dunno, most people find this place for C or C++ rather than Javascript.
04-25-2012
golf_fanatic

i rlly dont know why i even took the class its not required in my business degree i just always wanted to know a little bit of programming so i took pricncliples of programming i believed i accomplished that
this is the only assignment i can not figure out
I was suppose to write a program in java script that ask for the user for a keyboard character and a number of rows and a number of columns
to accomplish this
rrrrr
r__r
r__r
rrrrr
but the inside should be blank

so if u could bold all the items i need to change in the C++ code ill try and covert it my self and ill resumbit it here so u can check it

Code:

int i; int j; for ( i = 0; i < width; i++ ) putchar ( c ); putchar ( '\n' ); for ( i = 1; i < height; i++ ) { putchar ( c ); for ( j = 1; j < width - 1; j++ ) putchar ( ' ' ); printf ( "%c\n", c ); } for ( i = 0; i < width; i++ ) putchar ( c ); putchar ( '\n' ); } int main ( void ) { printsquare ( 5, 5, '*' ); return 0; }
04-25-2012
laserlight

Quote:

Originally Posted by golf_fanatic

I was suppose to write a program in java script that ask for the user for a keyboard character and a number of rows and a number of columns

Ah, so you're writing Javascript.

The basic idea is that given r rows and c columns for a character x, assuming that both r and c are at least 2:

Code:

Loop c times Print x Print a new line character Loop (r - 2) times Print x Loop (c - 2) times Print a space Print x Print a new line character Loop c times Print x [Optionally, print a new line character]

(I use the indentation to denote the body of the loop.)
Notice that the idea of (r - 2) and (c - 2) is that you are printing a line before and a line after the outer loop, or the character x before and after the inner loop, so you need to account for them.

Note that with respect to HTML, you will likely need to print within <pre></pre> tags in order for the spaces and blank lines to be significant.
04-25-2012
golf_fanatic

Quote:

Originally Posted by laserlight

Ah, so you're writing Javascript.

The basic idea is that given r rows and c columns for a character x, assuming that both r and c are at least 2:

Code:

Loop c times Print x Print a blank line Loop (r - 2) times Print x Loop (c - 2) times Print a space Print x Print a blank line Loop c times Print x

(I use the indentation to denote the body of the loop.)
Notice that the idea of (r - 2) and (c - 2) is that you are printing a line before and a line after the outer loop, or the character x before and after the inner loop, so you need to account for them.

Note that with respect to HTML, you will likely need to print within <pre></pre> tags in order for the spaces and blank lines to be significant.

thx for explaining it for me
i got this so far in java script i just need to change the non workign variables into my variables i believe

Code:

{ int i; int j; for (i = 0; i < width; i++) System.out.print(c); System.out.print('\n'); for (i = 1; i < height; i++) { System.out.print(c); for (j = 1; j < width - 1; j++) System.out.print(' '); System.out.printf("%c\n", c); } for (i = 0; i < width; i++) System.out.print(c); System.out.print('\n'); } int main() { printsquare(5, 5, '*'); }
04-25-2012
laserlight

Quote:

Originally Posted by golf_fanatic

i got this so far in java script i just need to change the non workign variables into my variables i believe

Err... System.out.print? I recall document.write for Javascript.
04-25-2012
golf_fanatic

lol thats my fault the converter did that and i just changed it

Code:

for (i = 0; i < width; i++) document.write(c); document.write('\n'); for (i = 1; i < height; i++) { document.write(c); for (j = 1; j < width - 1; j++) document.write(' '); document.write("%c\n", c); } for (i = 0; i < width; i++) document.write(c); document.write('\n'); }

k now i just got to get it working using my variables i believe
04-25-2012
laserlight

Sigh, I really don't support this "conversion" business. It is totally the wrong way to do homework, and it will kill you in a test/exam. Understand the algorithm, don't just convert code blindly.

By the way, you should indent your code properly.
04-25-2012
golf_fanatic

by the way this was the final for my programming course and if i got the program working i got a 100 on my final i just emailed my instructor and he will help me finish the making the code work so thank you for all your time u wasted on me
basically this was my last assignment i will ever do involving programming

in case u wanted to see what i got so far now

Code:

{ for (i = 0; i < numCol; i++) document.write(c); document.write('\n'); for (i = 1; i < numRow; i++) { document.write(c); for (j = 1; j < numCol - 1; j++) document.write(' '); document.write("%c\n", c); } for (i = 0; i < numCol; i++) document.write(c); document.write('\n'); }

since you had the ability to move my thred you can go aheadand close it if u want i pretty much got enough work done for a passing grade so far just gonna try for the 100