hello everyone, i wrote a code in C that suppose to calculate COS of an angle.

i dont need help with the writing, i just have one problem, for some reason the program doesnt enter the function cosApprox, it suppose to enter the function and save the result in sum_column , but it just skips it, does someone knows why?

Thanks.

Code:#include <stdio.h> #include <conio.h> #include <math.h> #define PI 3.1415927 double power(double a, int b); long factorial(int n); double cosElement(double x, int i); double cosApprox(double x, int i); int main() { double x; /* Angle variable */ int k; /* Number of elements variable */ double sum_column; /* Sum of all elements variable */ clrscr(); printf("\nEnter an angle (in Radians):"); scanf("%lf", &x); printf("\nEnter number of elements:"); scanf("%d", &k); while(k<0) { printf("Erroneous Input. Please enter number of elements (k>=0):"); scanf("%d", &k); } sum_column=cosApprox(x, k); /* a function to calculate the sum of elements */ printf("The value of Cos(x) is: %.4lf", 1+sum_column); getch(); return 0; } double cosApprox(double x, int i) { double sum=0; for(i=i;i>0;i--) { sum=sum+cosElement(x, i); } return sum; } double cosElement(double x, int i) /* a function to calculate the element in the i place of the column */ { double element; element=pow((-1),i)*power(x,i)/factorial(i); return element; } long factorial(int n) /* a function to calculate the factorial of a number */ { long sum_f=2*n; int i; for(i=2*n;i>1;i--) { sum_f=sum_f*(2*n-1); } return sum_f; } double power(double a, int b) /* a function to calculate x^2k */ { double power; power=pow(a,2*b); return power; }