Thread: Help with adding new functions

Hi, I am new to c and I have come across a problem when adding other functions to a programme and printing the values. The question I am attempting to solve is :

Code:

The following function computes ex by summing the Taylor series expansion to 
n terms. Write a program to print a table 
of ex using both this function and the exp()
 function from the math.h library, for x = 0 to 1 in steps of 0.1. 
The program should ask the user what value of n to use.
double taylor(double x, int n)
{
int i;
    double sum = 1.0;
    double term = 1.0;
        for (i=1; i<=n; i++)
        {                       /*Or we could have written: */
        term = term * x / i;     /* term *= x / i; */
        sum = sum + term;      /* sum += term; */
        }
return sum;
}

My code is

Code:

#include<stdio.h>
#include<stdlib.h>
#include<math.h>


/*Taylor series for e*/

double taylor(double x, int n)
{
        int i;
        double sum = 1.0;
        double term = 1.0;
                
                 /* Value of n*/
                     {
                         printf(" Value of n :\n" );
                         scanf("%f",&n);
                     }
                 
                         for (i=1; i<=n; i++)
                         { 
                             term = term * x / i; 
                             sum = sum + term;
                             printf(" Taylor series : %f\n", sum);
                         }
                         
                         
                         
     return sum;
}    
    int main ()
    
{          
         int i;
         double n, x, terme;
         
         /* e using math function*/
             
             for(x=0; x<=1; x = x+0.1)
             {
             
             terme = exp(x);
             printf(" The values of the exponential term : %f\n", terme);
             
             }
             taylor(x,n);

     return(0);
}

The code prints out the values for exp, but it gets stuck in the Taylor function and I'm not sure how to solve it.

Thanks

Turn up your compiler warnings and fix them:

Code:

taylor.c:17:37: warning: format specifies type 'float *' but the argument has
      type 'int *' [-Wformat]
                         scanf("%f",&n);
                                ~~  ^~
                                %d
taylor.c:34:14: warning: unused variable 'i' [-Wunused-variable]
         int i;
             ^
taylor.c:46:23: warning: variable 'n' is uninitialized when used here
      [-Wuninitialized]
             taylor(x,n);
                      ^
taylor.c:35:18: note: initialize the variable 'n' to silence this warning
         double n, x, terme;
                 ^
                  = 0.0
3 warnings generated.