I have written star pyramid pattern code using pointer to pointer in C but can't resolve the error, please help

Question

1.00/5 (2 votes)

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#include<stdio.h>
    #include<stdlib.h>
    #include<string.h>
    int main(){
         int n,i,j=0;
         char** a = (char**)calloc(n,sizeof(char*));
         printf("enter the level of pyramid: ");
         scanf("%d",&n);
         for(i=0;i<n;i++){
            *(a+i)=(char*)calloc((2*n-1),sizeof(char));
            while(j<(n-1-i)){
                 *(*(a+i)+j) = ' ';
                 j++;
            }
             while(j<(n-1-i+(2*i+1))){
                 *(*(a+i)+j)='*';
                j++;
            }
            while(j<(2*n-1)){
                *(*(a+i)+j) = ' ';
                 j++;
            }
             //printf("%s",*(a+i));
            puts(*(a+i));
        }
         return 0;
     }

What I have tried:

Please refer description, I am unable to debug the code

Posted 5-Oct-21 11:34am

ABDEALI ATTARWALA

Updated 5-Oct-21 22:29pm

RedDk

v3

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Comments

jeron1 5-Oct-21 17:56pm

and the error would be?

ABDEALI ATTARWALA 6-Oct-21 0:51am

the output for n=3 is displayed as follows
*
and for every n it is just printing one star and leaving spaces, if possible please run the code so that you can see the complete output
Thank you

2 solutions

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Patrice T · Accepted Answer · 2021-10-05T11:59:00

Solution 1

Quote:
I have written star pyramid pattern code using pointer to pointer in C but can't resolve the error

On first look, I would start by resetting the column number on every line.

C++

for(i=0;i<n;i++){
   *(a+i)=(char*)calloc((2*n-1),sizeof(char));
   j=0;
   while(j<(n-1-i)){

Posted 5-Oct-21 11:59am

Patrice T

Comments

ABDEALI ATTARWALA 6-Oct-21 0:58am

Thank you sir, it really worked!

KarstenK · Accepted Answer · 2021-10-05T22:29:00

Solution 2

Learn to use the debugger for debugging and understand the code. Start with some Debugger video tutorial.

When you dont like debugging than coding is pain in the ass ;-)

Posted 5-Oct-21 22:29pm

KarstenK

Comments

ABDEALI ATTARWALA 7-Oct-21 7:03am

thanks, I'll surely look into it.