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http://www.hackerschool.org/HS_Boards/zboard.php?desc=asc&no=3384 [º¹»ç]


1. Á¶ÇÕÀ» ±¸ÇÏ´Â ÇÁ·Î±×·¥À» Â¥¶ó
#include<stdio.h>
int main()
   {
           int k;
           int n, r;
           int ncr;
            
            
             while(1)
               {
                 printf("Enter two numbers n and r (but, n >= r) :");
             scanf("%d %d",&n,&r);
                
                 if( n < r)
                         break;
                
                 if(r == 0 || n == r)
                         printf("n C r = 1\n");
                     else
                         {
                  
           for( k = 1, ncr = 1 ; k <= r ; k++)
                      {  ncr = ncr * ((n - k + 1) / k);
                        
                  }
           printf("n C r = %d\n",ncr);}
               }
          
                  printf("Error : n is less than r, End Program");

          
          
          return 0;
   }
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  Hit : 4883     Date : 2012/04/08 08:59



    
ralehgus123 #include<stdio.h>

int nCr(int n,int r)
{
int k;
int ncr;
if( n < r)
printf("Error : n is less than r, End Program");


if(r == 0 || n == r)
printf("n C r = 1\n");
else
{
for( k = 1, ncr = 1 ; k <= r ; k++)
ncr = ncr * ((n - k + 1) / k);


printf("n C r = %d\n",ncr);}
return 0;
}

int main()
{

int n;
int r;


printf("Enter two numbers n and r (but, n >= r) :");
scanf("%d %d",&n,&r);
nCr(n,r);


return 0;
}




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