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  1. #include <stdio.h>
  2.  
  3. int factorial(int x){
  4.       int fact =1;
  5.       for( int i=1;i<=x;i++){
  6.           fact= fact*i;
  7.           }
  8.       return fact;
  9.   }
  10.  
  11. int main() {
  12.  
  13.      int n;
  14.      printf("Enter the n: ");
  15.      scanf("%d",&n);
  16.  
  17.      int r;
  18.      printf("Enter the r: ");
  19.      scanf("%d",&n);
  20.  
  21.      int ncr=factorial(n)/(factorial(r)*factorial(n-r));
  22.      printf("The answer is %d",ncr);
  23.  
  24. 	return 0;
  25. }
  26.  
Success #stdin #stdout 0s 5288KB
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stdout
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Enter the n: Enter the r: The answer is 1
https://ideone.com/7pMraN
language:
C (gcc 8.3)
created:
13 hours ago
visibility:
public

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