Thread: Printing a reverse pyramid using C

Hello fellow programmers,
I'm a beginner in learning C and stuck at a problem.
As the title suggests, I want to print a Reverse pyramid. Now it was easy if I wanted to print asterisk(*) and I successfully (with the help of an online tutorial) fulfilled this task by applying the following code:

Code:

int main (void){
    int i,n,j;
    n=6;
    for(i=n;i>0;i--)
    {
        for(j=n-i;j>0;j--)
            printf("  ");
        for(j=2*i-1;j>0;j--)
            printf(" *");
        printf("\n");
    }
    return 0;
}

But the problem arises now when I want integers instead of * in the output. And the requirement is that they be in following particular order:

Code:

Output:
   1111111111
    22222222
     333333
      4444
       55

I tried many times manipulating the declarations and definitions and for loops but all in vain. Any help in this regard would be much appreciated.

Well, you've already done the hard work and all you need to do is use a variable that changes by a value of one, with each row.

Originally Posted by gemera

Well, you've already done the hard work and all you need to do is use a variable that changes by a value of one, with each row.

Thanks for the quick reply. A little bit elaboration would be required I'm afraid.

Ok, the easier way to begin with would be to number from 6 at the base down to 1 at the tip. How would you do that?

Instead of * I will use this statement to print for 6 to 1 at the tip.

Code:

printf(" %d",i);

Yup, and a little bit of arithmetic will now get you what you wanted originally.

I'm trying..Its been 2 hours manipulating digits here and there, trying different arithmetic operations. I just can't get to it.
Can you tell me exactly how would I print that target? Please?

This site has a policy of not just giving out solutions, and I wouldn't be helping you long term by doing so.

An easier problem to try and solve from where you are now would be to try and number from 0 at the base instead of 1.

If you have that - moving to the solution you want should be trivial.

I just read the rules. I apologize for asking for the solution.
I'll try and post the results once I'm done. Thanks for the help.

Done. Its working. Thanks for the help and hints.

Code:

int main (void){
    int i,n,j;
    n=5;
    for(i=1;i<=n;i++)
    {
		for(j=1;j<=i-1;j++)
            printf("  ");
        for(j=1;j<=12-2*i;j++)
            printf(" %d",i);
        printf("\n");
    }
    return 0;
}