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

void spoji_saberi(int argc, char *argv[], char* (*dodaj)(char*, char*), int (*saberi)(int, int));

char *dodaj(char*, char*);

int saberi(int a, int b);

int main(int argc, char *argv[])
{
    spoji_saberi(argc, argv, dodaj, saberi);
}

void spoji_saberi(int argc, char *argv[], char* (*dodaj)(char*, char*), int (*saberi)(int, int))
{
    int wt = 0;
    int sum = 0;
    char *ans = NULL;
    int un = 0, dun = 0;
    int cnt = 0;
    for (int i = 1; i < argc; ++i)
    {
        if (!strcmp(argv[i], "-s"))
        {
            if (wt == 2)
            {
                printf("Suma je %d.", sum);
            }
            wt = 1;
        }
        else if (!strcmp(argv[i], "-b"))
        {
            if (wt == 1)
            {
                printf("String je '%s'.", ans);
            }
            wt = 2;
        }

        if (wt == 1 && strcmp(argv[i], "-s"))
        {
            ans = (*dodaj)(ans, argv[i]);
        }
        else if (wt == 2 && strcmp(argv[i], "-b"));
        {
            sum = (*saberi)(sum, atoi(argv[i]));
        }
    }

    if (wt == 1)
        printf("String je '%s'.", ans);
    else if (wt == 2)
        printf("Suma je %d.", sum);

    free(ans);
}

int saberi(int a, int b)
{
    return a + b;
}

char *dodaj(char *a, char *b)
{
    char *f;
    if (a != NULL)
        f = calloc((strlen(a) + strlen(b) + 1), sizeof(char));
    else
        f = calloc((strlen(b) + 1), sizeof(char));
    if (a != NULL)
    {
        strcpy(f, a);
        free(a);
    }
    strcat(f, b);

    return f;
}