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  1. /**
  2.  * C program to print all Strong Numbers between 1 to n
  3.  */
  4.  
  5. #include <stdio.h>
  6.  
  7. int main()
  8. {
  9.     int i, j, cur, n;
  10.     long fact, sum;
  11.  
  12.     /* Reads a number from user */
  13.     printf("Find Strong numbers between 1 to ");
  14. 	n= 6000000;
  15.  
  16.  
  17.  
  18.     printf("All Strong numbers between 1 to %d are:\n", n);
  19.  
  20.     /* Finds all Strong numbers between 1 to n */
  21.     for(i=1; i<=n; i++)
  22.     {
  23.         /* Number to check whether it is Strong number or not */
  24.         cur = i;
  25.  
  26.         sum = 0;
  27.  
  28.         /*
  29.          * Finds the sum of factorial of each digits
  30.          */
  31.         while(cur!=0)
  32.         {
  33.             fact = 1;
  34.  
  35.             /* Computes factorial of last digit i.e. cur%10 */
  36.             for( j=1; j<=cur%10; j++)
  37.             {
  38.                 fact = fact * j;
  39.             }
  40.  
  41.             sum = sum + fact; 
  42.  
  43.             cur = cur / 10;
  44.         }
  45.  
  46.         /*
  47.          * Checks if it is Strong number then print it
  48.          */ 
  49.         if(sum==i)
  50.         {
  51.             printf("%d is Strong number\n", i);
  52.         }
  53.     }
  54.  
  55.     return 0;
  56. }
Success #stdin #stdout 0.32s 2168KB
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Find Strong numbers between 1 to All Strong numbers between 1 to 6000000 are:
1 is Strong number
2 is Strong number
145 is Strong number
40585 is Strong number
https://ideone.com/X9PBoK
language:
C (gcc 8.3)
created:
7 years ago
visibility:
public

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