Problem with a simple Arithmetic equation.

[Laythe]

Greeting EveryOne

Why am i always getting 0 as a result in the following code?

#include <stdio.h>

int CelsiusToFehrenheit(int F);

int main()
{
    int i;
    int j;

    j = (5/9)*(40-32);

    printf("\n");
    printf("40F = %dC\n\n", j);
    printf("100F = %dC\n\n",CelsiusToFehrenheit(100));

    printf("Celsius\t\t\tFehrenheit\n");



    for (i=1; i<=10; i++)
    {
        printf("%d\t\t\t%d\n", i, CelsiusToFehrenheit(i));
    }

    printf("\n");
    return 0;
}


int CelsiusToFehrenheit(int F)
{
    int C;
    C = (5/9)*(F-32);
    return C;
}

Thanks In Advance

[quzah]

What is 5 / 9 ? 0.
What's 0 * anything? 0.

If you want floating point numbers, you need floating point variables.


Quzah.

[Laythe]

Thank you quzah for your hint, i have made it

#include <stdio.h>

float CelsiusToFehrenheit(float F);

int main()
{
    float i;
    float j;

    j = (5.0/9)*(40-32);

    printf("\n");
    printf("40F = %.2fC\n\n", j);
    printf("100F = %.2fC\n\n",CelsiusToFehrenheit(100.0));

    printf("Celsius\t\t\tFehrenheit\n");



    for (i=1; i<=10; i++)
    {
        printf("%.0f\t\t\t%.2f\n", i, CelsiusToFehrenheit(i));
    }

    printf("\n");
    return 0;
}


float CelsiusToFehrenheit(float F)
{
    float C;
    C = (5.0/9)*(F-32);
    return C;
}

any other tips?

[Adak]

Should your temperatures be reported in tenths or hundredths of a degree? I'm used to seeing them in just integers.

[Laythe]

Should your temperatures be reported in tenths or hundredths of a degree? I'm used to seeing them in just integers.

The exercise was tended to practice the printf function and how it handles ints and floats.

[Babkockdood]

I would print them in tenths.