how can i make a programin C that output a combination?

Answer 1

I guess that you want to write a program for the formula

nCm = n!/((m!)*(n-m)!)

The only thing you need is the code to calculate factorial.

float recurs(int n)
{
if (n<=0) return 1.0;
else return (n*recurs (n-1));
}

As can be seen this is recursive function. You can write non-recursive function by simply having a loop instead.

float recurs(int n)
{
float factorial;
for(int i=1;i<=n;i++)
factorial *=i;
return factorial;
}

Now you can write your program like this.

main()
{

int n,m;
printf("Enter n and m \n");
scanf ("%d %d",&n,&m);
printf("The combination is %f", /
recurs(n)/(recurs(m) * recurs(n-m))
}

Answer 2

A combination of what??????

More details would be helpful.....