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

int ft_strlen(const char *src) {
    int i = 0;
    while (src[i]) i++;
    return i;
}

char *ft_concat_params(int argc, char **argv) {

    // Conta o tamanho das strings.
    int count = 1; // 1 = espaço do terminador nulo.
    for (int i = 0; i < argc; i++) {
        count += ft_strlen(argv[i]);
    }

    // Cria a nova string que será retornada.
    char *newString = (char *) malloc(count);

    // Copia as strings para o newString.
    // Usa aux para percorrer o espaço de memória de newString.
    char *aux = newString;
    for (int i = 0; i < argc; i++) {
        for (int j = 0; argv[i][j]; j++, aux++) {
            aux[0] = argv[i][j];
        }
    }

    // Adiciona o terminador nulo.
    aux[0] = 0;

    // Terminamos.
    return newString;
}

int main(void) {
    const char *strings1[] = {"banana", "pera", "uva"};
    char *a = ft_concat_params(3, strings1);
    printf("[%s] - %d\n", a, ft_strlen(a));
    free(a);

    const char *strings2[] = {"", "teste", "", "mais", "", "perigoso", ""};
    char *b = ft_concat_params(7, strings2);
    printf("[%s] - %d\n", b, ft_strlen(b));
    free(b);

    const char *strings3[] = {"", "", ""};
    char *c = ft_concat_params(3, strings3);
    printf("[%s] - %d\n", c, ft_strlen(c));
    free(c);

    const char *strings4[] = {};
    char *d = ft_concat_params(0, strings4);
    printf("[%s] - %d\n", d, ft_strlen(d));
    free(d);

    return 0;
}