Array?

[perryd]

I'm trying to write a program in c language asking the user for an operation symbol and four intergers that are two fractions. The program needs to compute the specified operation on the two fractions and then print out the answer as a fraction? Do I use an array?

Perry

[perryd]

This program that i wrote doesn't quite work correctly?Its a program to calclate the exponential of x when the user puts in a value for x.

#include <stdio.h>
double expon(double xth, double nth);
double factorial(doubl e num);
int main()
{
int n;
int value;
double x;
double total;
total=0.0;
printf("e**, enter a number for x (0t to exit): ");
scanf("%f", &x);
if(x==0) return 0;
n=0;
while(n<25)
{
total=total+exp on(x, n)/factorial(n);
n++;
}
printf("e** %d is %f \n", (int)x, total);
}
return 0;
}
double factorial(doubl e num)
{
int i;
double fact;
fact = 1.0;
for(i=1; i<=num; i++)
fact=fact*i;
return fact;
}
double expon(double xth, double nth)
}
double ans;
int exp;
exp=nth;
if(nth<0)
nth=-1*nth;
ans=1.0;
while(nth>0)
{
ans=ans*xth;
nth--;
}
if(exp<0)
ans=1.0/ans;
else ans=ans;
return ans;
}

[Banfa]

Do I use an array?

The choice is entirely yours but personally I would use a structure or class.

class Fraction
{
public:
    int Denominator;
    int Numerator;

    operator*(Fraction &op);
}

etc.

In the second question any reason why you aren't using

double exp( double x );

defined in math.h?