C programming Loop question?
 

HI,

I am doing self 'C' study from a book I bought.

I have been trying to figure out how to write this into code.

Write a program that has the user input a height and width. Then it draws a rectangle made of #'s.

For example

Enter a height: 3
Enter a width: 5

#####
#####
#####

Could anybody please show me how this is done. Thanks much.

SAMPLE OUTPUT:

One more question
 

HI,

Thanks for the help. Could you help me with this one
What is the value of J++

I think J++ means plus one. What would the output me?

#include <stdio.h>
int main(){
int i=0,j=0,k=0;
while(((i < 5) || (j < 20)) && (k != 5)){
if((j % 3) == 0){
k++;
i = i + 2;
}
i--;
j++;
}
return 1;
}

Please put your code samples in <code> tags---it keeps the formatting and makes it much easier to read.....

"j++" does not have a value. The expression means "increment j after using it".

"++j" means "increment j before using it".

BE?
If you mean what is the output of the code, why not run it and see?

Hello. What book are you studying [sorry for not providing help]?

What is the value of j++ after running the program
 

HI,

After I ran the program I get nothing. Does that mean it will just keep running forever. j++

#include <stdio.h>
int main(){
int i=0,j=0,k=0;
while(((i < 5) || (j < 20)) && (k != 5)){
if((j % 3) == 0){
k++;
i = i + 2;
}
i--;
j++;
}
return 1;
}



Any help would be geat

What is the value of j++ after running the program
 

HI,

After I ran the program I get nothing. Does that mean it will just keep running forever. j++

#include <stdio.h>
int main(){
int i=0,j=0,k=0;
while(((i < 5) || (j < 20)) && (k != 5)){
if((j % 3) == 0){
k++;
i = i + 2;
}
i--;
j++;
}
return 1;
}



Any help would be great

No, it will not run forever. Eventually the value of k will hit 5 and the loop will exit. If you want some output on the screen, you might want to add something like

printf("i=%d, j=%d, k=%d\n", i, j, k);

right after the line "i = i + 2". It also helps if you include your code into the code tags, it will be more readable, like this:

Funny that you're returning 1. Is there any particualr reason for that? ;)

Another thing. Try reading your code as if it were just plain text. It's a good way to understand what the program is doing. In your case it will look like this:

Make i, j and k zero, then, while the condition "(i is less than 5 or j is less than 20) and k is not five" is true, do the following:
if j is divisible by three, increment k and add 2 to i.
subtract 1 from i
increment j by one.

Good luck.

Just to add to what Uncle_Theodore said about reading the code a good self-test would be to decide what the values of i, j and k would be each time the code prints out the values, and what the final values will be - before you actually run the code. Were you correct? If not why were you wrong? So long as you understand those questions you will have learnt something from the code.