Write a C Program To Use recursive calls to evaluate f(x) = x – x3/3! + x5/5! – x7/7! + ……

Write a C Program To Use recursive calls to evaluate f(x) = x – x3/3! + x5/5! – x7/7! + ……

1:  #include<stdio.h>  
2:  #include<conio.h>  
3:  int main()  
4:  {  
5:        float series(float,int),x;  
6:        int n;  
7:        clrscr();  
8:        printf("\nEnter X:");  
9:        scanf("%f",&x);  
10:        printf("\nEnter n:");  
11:        scanf("%d",&n);  
12:        printf("\nAns %f",series(x,n));  
13:        getch();  
14:        return 0;  
15:  }  
16:  float series(float x,int n)  
17:  {  
18:        long factorial(int);  
19:        float power(float,int);  
20:        float sum=0;  
21:        int i,s=1;  
22:        for(i=1;i<=n;i+=2)  
23:        {  
24:              sum+=(power(x,i)/factorial(i))*s;  
25:              s*=-1;  
26:        }  
27:        return sum;  
28:  }  
29:  float power(float x, int y)  
30:  {  
31:        float p=1;  
32:        int i;  
33:        for(i=1;i<=y;i++)p*=x;  
34:        return p;  
35:  }  
36:  long factorial(int p)  
37:  {  
38:        long f=1;  
39:        int i;  
40:        for(i=1;i<=p;i++)f*=i;  
41:        return f;  
42:  }