C language-use Taylor formula to calculate the value of sinx (do not call library functions, define functions yourself)

tags: C# Brush Question Record [Beginner] c language algorithm

#include<stdio.h>
#include <math.h>
//First define a factorial function
double fac(double n){
    double f=0;
    if(n == 1 || n==0)
        f =1;
    else
        f = fac(n-1)*n;

    return f;
}
//An exponential function (power)
double kvat(double n,double ci){
    double chengf=1;
        for (int i=1; i<=ci; i++) {
            chengf = chengf*n;
        }
    return chengf;
}

double sinus(double x){
    int z =-1;
    int j =1;
    double sin=x;
    for (j =3;fabs( kvat(x,j)/fac(j) )>0.001 ; j+=2) {
//        printf("%lf\n",kvat(x, j));
        sin =sin + z*(kvat(x,j)/fac(j));
        z = -z;
    }
    return sin;
}
int main(){
    double jd,hudu;
    scanf("%lf",&jd);
    hudu = (jd*M_PI)/180;//M_PI here is pi pai in math library
    printf( "%.3lf",sinus(hudu));
    return 0;
}

Intelligent Recommendation

c connecting the two strings do not use the language library functions

...

Character string turn, do not use any C language library functions

Today, a friend asked me, I wrote it, it is very simple, it is involved in some basic knowledge. The more you learn, the more you can't forget....

Calculate Cos value using Taylor formula

Calculate the cosine value from 0 to 359 degrees, and calculate the average need to calculate the size of the last n of the result, n starts from 0. As n increases, each item is also a very expensive ...

C Language: Realize string reverse functions (do not use library functions, only open space)

Record: strlen () function and printf ("% s", str) are all encountered with '\ 0' ending. And the parameters inside the printf () are from right to left. The result of running is 2,1 B,A...

Use c++ to call matlab functions written by yourself under Ubuntu

The blog is "Ubuntu related》The third part of the series of blogs. This series of blogs mainly records the installation of various software or libraries on Ubuntu, so as to facilitate the quick r...

More Recommendation

C language: calculate the solution of ax^2+bx+c=0, use three functions to calculate the root when delta is greater than, equal to, and less than 0 and store them in three sub-files respectively, enter the value of abc in the main function and Call functions

Source of the topic: Dagong Mu Lessonlink OF: Caleb Sung Topic requirements Calculate the solution of ax^2+bx+c=0, use three functions to calculate the root when delta is greater than, equal to, and l...