Mega Code Archive
Factorial series-e^x
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#include <stdio.h>
#include <conio.h>
#include<math.h>
long int factorial(int n);
void main()
{
int x,i;
float s,r;
char c;
clrscr();
printf("You have this series:-1+x/1! + x^2/2! + x^3/3! + x^4/4!
..x^x/x!");
printf("
To which term you want its sum? ");
scanf("%d",&x);
s=0;
for (i=1;i<=x;i++)
{ s=s+((float)pow(x,i)/(float)factorial(i)); }
printf("The sum of %d terms is %f",x,1+s);
fflush(stdin);
getch();
}
long int factorial(int n)
{
if (n<=1)
return(1);
else
n=n*factorial(n-1);
return(n);
}
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