Thread: tringle pyramid

Originally Posted by Kittu20

I want to print following pyramid
I don't understand how to convert logic into code
any help please

i.e. I don't know how to program.

Originally Posted by Salem

Start with better variable names.

Don't be afraid to create further ones to add meaning.

Don't be afraid to create functions to do bits of repetitive work.

Code:

void print_symbol(char c, int n) {
  for ( int i = 0 ; i < n ; i++ ) putchar(c);
}

int main ( ) {
  for ( row = 0 ; row < 5 ; row++ ) {
    num_spaces = row;
    num_stars = row;
    print_symbol(' ', num_spaces);
    print_symbol('*', num_stars);
    printf("\n");
  }
}

Now all you need is the right calculations.

I tried your approach and I have written code. I get expected output but there is one problem I am getting first empty column and I don't know how to remove it

Code:

#include<stdio.h>

void print_symbol(char c, int n) {
  for ( int i = 0 ; i < n ; i++ )
putchar(c);


}
 
void print_symbol2(char c, int n) {
  for ( int i = 5 ; i >=n ; i-- )
putchar(c);


}
int main ( ) 
{
	
	int row,  num_spaces, num_stars;
	
  for ( row = 5  ; row > 0; row-- ) 
  {
    num_spaces = row;
    num_stars = row;
    print_symbol(' ',  num_spaces);
    print_symbol2('*', num_stars);
    printf("\n");
  } 
}

Hey Kittu20, That looks like a problem I solved a few months ago from a "C Programming" book by K.N. King. Did you get it resolved?

You should try simplifying the problem.

First try and write a program that creates this output

Code:

*
*
*
*
*

Then create a program that indents each asterisk one place to the right.

Code:

 *
 *
 *
 *
 *

If you can accomplish the above then you should be able to create the triangle.

Originally Posted by Salem

Why do you need two print_symbol functions?
You don't need two.

> num_spaces = row;
> num_stars = row;
These were EXAMPLES!
Not something your you to copy/paste.

You need to figure out a proper calculation for each variable.
- The number of spaces decreases by row
- The number of stars increases by row

I tried hard to think about the calculation but I can't figure out right calculations. Can you give any clues

Hey Kittu20, where did you get this question? I've run into it before and I can't remember. Try this code:

Code:

#include<stdio.h>


int main (){
    int i, j;


    for (i=0;i<=5;i++){
        for (j=5;j>=0;j--){
            if(i<j){
                printf(" ");


            }
            else{
                printf("*");
            }
        }
        printf("\n");
    }
    return 0;
}

Just have to pad the spaces first and then draw a star.