latitude longitude converter

converter.c

#include <stdio.h>
#include <stdlib.h>

float calculate(unsigned long x)
{
    float f;
    float delta = 0.000277778;
    unsigned long limit = 0x7FFFFFFF;

    if (x < limit) {
        f = (x * 0.01);
    } else {
        limit = 0xFFFFFFFF;
        f = 0 - ((limit - x) * 0.01);
    }
    // return in arcsec to degree
    return (f * delta);
}

/**
 *      Latitude = FF82AE23 (22.813769° S)      4286754339
 *                                              82129,5683998 (arcsec)
 *
 *      Longitude = FEFD90EA (47.046461° W)     4278030570
 *                                              169367,2596 (arcsec)
 */

int main(void)
{
    float latitude, longitude;

    latitude = calculate(0xFF82AE23);
    longitude = calculate(0xFEFD90EA);
    if (latitude < 0) {
        printf("latitude: %.4f S\n", (latitude * -1));
    } else {
        printf("latitude: %.4f N\n", latitude);
    }

    if (latitude < 0) {
        printf("longitude: %.4f W\n", (longitude * -1));
    } else {
        printf("longitude: %.4f E\n", longitude);
    }
    return 0;
}