I am using the following code-
#include <stdio.h>
using namespace std;
double fact(double a)
{
if(a <= (double)1)
{
return (double)1.00000;
}
return afact(a-(double)1.00000);
}
int perm(double a, double b)
{
return fact(a)/fact(a-b);
}
int main() {
int t;
scanf("%d", &t);
while(t–)
{
double n, q;
scanf("%f%f", &n, &q);
double sum = (double)0.00000;
double like = (double)0.00000;
for(double i = (double)1; i <= q; i = i + (double)1.00000)
{
sum += (n+q)(perm(n+q, q-i));
like += (perm(n+q, q-i));
}
double ll = sum;
double lm = like;
double lk = ll/lm;
printf("%f", lk);
}
return 0;
}
when I run it, it gives me “-nan” as the output but it runs successfully. what have I done wrong here? Can anybody help?
