38 lines
749 B
C
38 lines
749 B
C
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/* Binomial Coefficient - Write a function to find factorial of a number. Using this function, find value of binomial co-efficient (B) where B = n! / r! * (n-r)! where n and r are natural numbers. */
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#include <stdio.h>
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#include <conio.h>
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long fact(int n) ;
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void main()
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{
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int n, r ;
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long f1, f2, f3, b ;
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clrscr() ;
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printf("Enter natural numbers n and r (n>r): ") ;
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scanf("%d %d", &n, &r) ;
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f1=fact(n) ;
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f2=fact(r) ;
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f3=fact(n-r) ;
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b=f1/(f2*f3) ;
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printf("Binomial Coefficient = %ld", b) ;
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getch() ;
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}
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long fact(int n)
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{
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int i;
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long f=1 ;
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for(i=1 ; i<=n ; i++)
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f=f*i ;
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return f ;
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}
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/*
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Output:
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Enter natural numbers n and r (n>r): 9 5
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Binomial Coefficient = 126
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*/
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