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  1. #include <stdio.h>
  2. #include <math.h>
  3.  
  4. char ToAscii(int val)
  5. {
  6.     return (val >= 0 && val <= 'Z' - 'A')? val + 'A': ' ';
  7. }
  8.  
  9. int main(void)
  10. {
  11.     int n;
  12.     int i, j;
  13.     printf("Please indicate the number of stairs.\n>");
  14.     scanf("%d", &n);
  15.  
  16.     printf("\n");
  17.     printf("i = [%d, %d]\n", 1 - n, n - 1);
  18.     printf("j = [%d, %d]\n", 1 - n, n - 1);
  19.  
  20.     printf("\n");
  21.     printf("f(i, j) = i + j\n");
  22.  
  23.     for(i = 1 - n; i < n; ++i)
  24.     {
  25.         for(j = 1 - n; j < n; ++j)
  26.         {
  27.             int val = i + j;
  28.             printf("%c", ToAscii(val));
  29.         }
  30.         printf("\n");
  31.     }
  32.  
  33.     printf("\n");
  34.     printf("f(i, j) = abs(i) + abs(j)\n");
  35.  
  36.     for(i = 1 - n; i < n; ++i)
  37.     {
  38.         for(j = 1 - n; j < n; ++j)
  39.         {
  40.             int val = abs(i) + abs(j);
  41.             printf("%c", ToAscii(val));
  42.         }
  43.         printf("\n");
  44.     }
  45.  
  46.     printf("\n");
  47.     printf("f(i, j) = %d - (abs(i) + abs(j))\n", n - 1);
  48.  
  49.     for(i = 1 - n; i < n; ++i)
  50.     {
  51.         for(j = 1 - n; j < n; ++j)
  52.         {
  53.             int val = n - 1 - abs(i) - abs(j);
  54.             printf("%c", ToAscii(val));
  55.         }
  56.         printf("\n");
  57.     }
  58.     return 0;
  59. }
Success #stdin #stdout 0.02s 1680KB
comments (?)
stdin
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3
stdout
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Please indicate the number of stairs.
>
i = [-2, 2]
j = [-2, 2]

f(i, j) = i + j
    A
   AB
  ABC
 ABCD
ABCDE

f(i, j) = abs(i) + abs(j)
EDCDE
DCBCD
CBABC
DCBCD
EDCDE

f(i, j) = 2 - (abs(i) + abs(j))
  A  
 ABA 
ABCBA
 ABA 
  A
https://ideone.com/ue4ug7
language:
C (gcc 8.3)
created:
13 years ago
visibility:
secret

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