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Structures function

Oct 30, 2014 at 12:25am
Ndrewm (17)
I'm writing a function that compares two fraction. if the fractions are equal it returns 0. If the fraction in the first parameter is less than the fraction in the second parameter it returns a negative number. Otherwise it returns a positive number. in doing so convert the fraction to a floating point number.

Im stuck need help completing the function to run


typedef struct fracion
{
int numo;
int denom;
}fraction;

int compareFractions (fracion, fraction);

void main()
{
int x;
fraction f1, f2;
printf("Enter Numo and Demo");
scanf_s("%d%d", &f1.numo, &f1.denom);
printf("Enter Numo and Demo");
scanf_s("%d%d", &f2.numo, &f2.denom);

x = compareFractions(f1, f2);
}

int compareFractions(fraction frac1, fraction frac2)
{
float conf1;
float conf2;

conf1 = frac1.numo / frac1.denom;
conf1 = frac2.numo / frac2.denom;



}
Oct 30, 2014 at 1:50am
ostar2 (118)
Here try this:

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#include <iostream>

int main()
{
    int frac[4];
    std::cout << ("Enter Numerator:");
    std::cin >> frac[0];
    std::cout << ("\nDenominator: ");
    std::cin >> frac[1];
    std::cout << ("Enter Numerator:");
    std::cin >> frac[2];
    std::cout << ("\nDenominator: ");
    std::cin >> frac[3];
    if((frac[0] && frac[1]) == (frac[2] && frac[3]))
    {
        if((frac[0] / frac[1]) < (frac[2] / frac[3]))
            std::cout << (frac[0] / frac[1]) << (' ') << (frac[2] / frac[3]);
            return(-1);
    }
    else
    {
        std::cout << (frac[0] / frac[1]) << (' ') << (frac[2] / frac[3]);
        return(0);
    }
    
}
Edit & run on cpp.sh
Last edited on Oct 30, 2014 at 2:16am
Oct 30, 2014 at 5:54am
closed account (48T7M4Gy)
if p/q == a/b then p*b = a*q.

if p/q < a/b then p*b < a*q etc ...

So, if you enter the two fractions as p,q,a & b you can apply the tests and produce the result you want all in integers.
Oct 30, 2014 at 10:10pm
Ndrewm (17)
I see where thesethese solutions would work but I'm look for something that say in the statements below which is guided from the original question.

Return 0
Else
Return -1
Nov 2, 2014 at 11:30pm
ostar2 (118)
Well, you must remember that main() cannot be type void it must always be int main(). Your best bet is to seperate the code:

compareFraction.h:

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#include <stdio.h>
typedef struct fracion
{
int numo;
int denom;
}fraction;
int compareFractions(fraction frac1, fraction frac2)
{
float conf1, conf2;
conf1 = frac1.numo / frac1.denom;
conf1 = frac2.numo / frac2.denom;
if(conf1 == conf2)
{
return(0);
}
else
{
return(-1);
}
}


main.cpp:
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#include "compareFraction.h"
int main()
{
int x;
fraction f1, f2;
printf("Enter Numo and Demo");
scanf_s("%d%d", &f1.numo, &f1.denom);
printf("Enter Numo and Demo");
scanf_s("%d%d", &f2.numo, &f2.denom);	

x = compareFractions(f1, f2);
return(2); //Non-void functions must return a value.
}
Edit & run on cpp.sh

And then go from there.
Last edited on Nov 2, 2014 at 11:31pm
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