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Author: Eftekharul21

Permutation and Combination in C programming.c

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+#include <stdio.h>
+int factorial(int n)
+{
+   int f;
+   for(f=1;n>1;n--)
+   f=f*n;
+   return f;
+}
+int npr(int n,int r)
+{
+   return factorial(n)/factorial(n-r);
+}
+int ncr(int n,int r)
+{
+   return npr(n,r)/factorial(r);
+}
+int main()
+{
+   int n,r;
+
+   printf("Enter the value of n: ");
+   scanf("%d",&n);
+   printf("Enter the value of r: ");
+   scanf("%d",&r);
+   printf("\nPermutation of %dP%d = %d\n",n,r,npr(n,r));
+   printf("Combination of %dC%d = %d\n",n,r,ncr(n,r));
+}