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Array?

3
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
Oct 15 '06 #1
2 1830
perryd
3
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(double 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+expon(x, n)/factorial(n);
n++;
}
printf("e** %d is %f \n", (int)x, total);
}
return 0;
}
double factorial(double 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;
}
Oct 15 '06 #2
Banfa
9,065 Expert Mod 8TB
Do I use an array?
The choice is entirely yours but personally I would use a structure or class.

Expand|Select|Wrap|Line Numbers
  1. class Fraction
  2. {
  3. public:
  4.     int Denominator;
  5.     int Numerator;
  6.  
  7.     operator*(Fraction &op);
  8. }
  9.  
etc.

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

double exp( double x );

defined in math.h?
Oct 16 '06 #3

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