Question

How to print a double pyramid pattern of numbers in C

Answer 1

#include <stdio.h> 

int main(void)
{   
    int i,j,k,l,b,n;
    printf("How many numbers? ");
    scanf("%d",&n);
    for(i=0;i<n;i++)
    {
        for(l=0;l<i;l++)
            printf(" ");
        for(j=i+1;j<=n;j++)
            printf("%d",j);
        for(k=n-1;k>i;k--)
            printf("%d",k);
        printf("\n");
    }
    b=n-1;
    for(i=0;i<n-1;i++)
    {
        for(l=n-2;l>i;l--)
            printf(" ");
        for(j=b;j<=n;j++)
            printf("%d",j);
        for(k=n-1;k>=b;k--)
            printf("%d",k);
        printf("\n");
        b--;
    }
    return 0;
}


 
/*
run:
   
How many numbers? 5
123454321
 2345432
  34543
   454
    5
   454
  34543
 2345432
123454321

*/

 

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