sin series

#include<stdio.h>
#include<conio.h>
#include<math.h>
int main()
{
    long i,j,n,f=1,c=1;
    float sum=0.0,x,k=1;
    printf("Enter n and x respectively considering following points:-\n");
    printf("1. x should be from 0 to 3.14\n");
    printf("2. n should be from 1 to 15\n");
    printf("3. if you are taking value of x more than 1 it is advised to take n greater than 10 for more pricision\n");
    scanf("%ld%f",&n,&x);
    for(i=1;i<=n;i++)
    {
        f=f*i;
        k=k*x;
        printf("%ld\t%f\t",f,k);
        if((c%2)==0)
        {
            sum=sum -(k/f);printf("1\n");
        }
        if((c%2)==1)
        {
            sum=sum +(k/f);printf("0\n");
        }
        c++;
    }
        printf("sin(%f)=%f",x,sum);
        return 0;
}