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  1. #include <stdio.h>
  2.  
  3. int main(void) {
  4. 	int n;//          12345
  5.           //          12 45
  6.         //            1   5
  7.     printf("Enter the number of rows: \n");
  8.     scanf("%d",&n);
  9.  
  10.     int nsc=n-1;
  11.     int nsp=1;
  12.  
  13.       for(int r=1;r<=2*n-1;r++)//  first line
  14.  
  15.          printf("%d",r);
  16.       printf("\n");
  17.  
  18.     for(int i=1;i<=n;i++){
  19.           int a=1;
  20.       for(int j=1;j<=nsc;j++){
  21.         printf("%d",a);
  22.          a++;
  23.       }
  24.          for(int k=1;k<=nsp;k++){
  25.          printf(" ");
  26.          a++;
  27.          }
  28.       for(int x=1;x<=nsc;x++){
  29.         printf("%d",a);
  30.          a++;
  31.        }
  32.  
  33.          nsc--;
  34.          nsp+=2;
  35.  
  36.     printf("\n");
  37.  
  38.     }
  39.  
  40. 	return 0;
  41. }
  42.  
Success #stdin #stdout 0s 5324KB
comments (?)
stdin
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5
stdout
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Enter the number of rows: 
123456789
1234 6789
123   789
12     89
1       9
https://ideone.com/yfg7L2
language:
C (gcc 8.3)
created:
2 days ago
visibility:
public

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