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  1. #include <stdio.h>
  2.  
  3. char* ans[] = 
  4. {
  5.     /*   0 */ "1",
  6.     /*   1 */ "1",
  7.     /*   2 */ "2",
  8.     /*   3 */ "6",
  9.     /*   4 */ "24",
  10.     /*   5 */ "120",
  11.     /*   6 */ "720",
  12.     /*   7 */ "5,040",
  13.     /*   8 */ "40,320",
  14.     /*   9 */ "362,880",
  15.     /*  10 */ "3,628,800",
  16.     /*  11 */ "39,916,800",
  17.     /*  12 */ "479,001,600",
  18.     /*  13 */ "6,227,020,800",
  19.     /*  14 */ "87,178,291,200",
  20.     /*  15 */ "1,307,674,368,000",
  21.     /*  16 */ "20,922,789,888,000",
  22.     /*  17 */ "355,687,428,096,000",
  23.     /*  18 */ "6,402,373,705,728,000",
  24.     /*  19 */ "121,645,100,408,832,000",
  25.     /*  20 */ "2,432,902,008,176,640,000"
  26. };
  27.  
  28. void factorial(int n)
  29. {
  30.     printf("facorial(%d) = ", n);
  31.  
  32.     if(n < 0 || n > 20) /* Error checking */
  33.     {
  34.         printf("ERROR: Number out of range\n");
  35.     }
  36.     else
  37.     {
  38.         printf("%s\n", ans[n]);
  39.     }
  40.  
  41. }
  42.  
  43. int main(int argc, char* argv[])
  44. {
  45.     int i;
  46.     for(i = -1; i<=21; factorial(i++));
  47.     return 0;
  48. }
Success #stdin #stdout 0s 2248KB
comments (?)
stdin 
Standard input is empty
stdout 
facorial(-1) = ERROR: Number out of range
facorial(0) = 1
facorial(1) = 1
facorial(2) = 2
facorial(3) = 6
facorial(4) = 24
facorial(5) = 120
facorial(6) = 720
facorial(7) = 5,040
facorial(8) = 40,320
facorial(9) = 362,880
facorial(10) = 3,628,800
facorial(11) = 39,916,800
facorial(12) = 479,001,600
facorial(13) = 6,227,020,800
facorial(14) = 87,178,291,200
facorial(15) = 1,307,674,368,000
facorial(16) = 20,922,789,888,000
facorial(17) = 355,687,428,096,000
facorial(18) = 6,402,373,705,728,000
facorial(19) = 121,645,100,408,832,000
facorial(20) = 2,432,902,008,176,640,000
facorial(21) = ERROR: Number out of range
https://ideone.com/vtPM6K
language:
C (gcc 8.3)
created:
11 years ago
visibility:
public

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