hajo

#include <stdio.h>
#include <math.h>

// 1/a
typedef struct { double x; double y; } position;
typedef struct { int h; int m; int s; } time;
typedef struct { position p; time t; } data;

void printdata(data k)
{
    printf("A hajo pozicioja: x=%f y=%f\n", k.p.x, k.p.y);
    printf("A hajo idoje: %d:%d:%d\n", k.t.h, k.t.m, k.t.s);
}
data readdata(void)
{
    data k;
    printf("Kerem a hajo poziciojat: ");
    scanf("%lf %lf", &k.p.x, &k.p.y);
    printf("Kerem a hajo idojet: ");
    scanf("%d %d %d", &k.t.h, &k.t.m, &k.t.s);
    return k;
}
int secdiff(time a, time b)
{
    int diff;
    diff = a.h * 3600 - b.h * 3600 + a.m * 60 - b.m * 60 + a.s - b.s;
    return sqrt(diff*diff);
}
int timecmp(time a, time b)
{
    if (a.h > b.h || a.m > b.m || a.s > b.s)
        return -1;
    if (a.h < b.h || a.m < b.m || a.s < b.s)
        return 1;
    return 0;
}
double sectionlen(position a, position b)
{
    return sqrt((a.x-b.x) * (a.x - b.x) + (a.y-b.y) *( a.y-b.y));
}

int main(void)
{
    // 1/a
    data data1, data2;

    data1.p.x = 3.4;
    data1.p.y = 5.6;
    data1.t.h = 2;
    data1.t.m = 4;
    data1.t.s= 6;

    data2.p.x = 5.3;
    data2.p.y = 6.4;
    data2.t.h = 3;
    data2.t.m = 3;
    data2.t.s = 45;

    // 1/b
    printdata(data1);
    printdata(data2);

    // 1/c
    //data1 = readdata();
    //data2 = readdata();

    // 1/d
    {
        int secd;
        secd = secdiff(data1.t, data2.t);
        printf("D1-D2 time(sec): %d\n", secd);
    }

    // 1/e
    {
        int cmp;
        cmp = timecmp(data1.t, data2.t);
        printf("D1<?>D2: %d\n", cmp);
    }

    // 1/f
    {
        double len;
        len = sectionlen(data1.p, data2.p);
        printf("D1-D2 length: %f\n", len);
    }

    /*
    {
        double vel = section_velocity(data1, data2);
    }
    */

    return 0;
}