Thread: i did not understood to the question. But i did i don't know is this correct or not

Code:

#include <stdio.h>
#include <math.h>
int
factorial (int number)
{
  int factorial;
  factorial = 1;


  for (int i = number; i > 1; i--)
    {
      factorial *= i;
    }
  return factorial;
}




int sigma()
{
    int sigma = 0;
    int n=2;
    for(int i=0; i<=100; i++){
        sigma += n*i+1;
    }
    return sigma;
}




float sinus_cal(float x)
{
    float sinus;
    float u = 0;
    int l = sigma();
    for(int i=0; i<=100; i++){
        // -1^i
        u += pow(-1, i);
    }
    sinus = ((u / factorial(l)) * pow(x,l));
    return sinus;
}


int main()
{   
    printf("%f",sinus_cal(3));
    return 0;
}