char *getFromMiddle(char *string, int l_string, char *first, int l_first, char *second, int l_second) { // the function has to return a char pointer, is it well declared?
	int i, j, x, f_pos, s_pos, l_middle;
	char t, *middle;
	printf("Declara variables \n");
		for(i=0;i<l_string;i++) {
			printf("For numero: %i \n", i);
			if(x != 1) {
				if(*string[i] == *first[j]) { //trouble here
					printf("Igualdad entre i nº=%i(%c) con j nº=%i(%c): %i \n", i, string[i], j, first[j]);
					j++;
					if(j == l_first) {
					printf("J(%i) = l_first(%i)",j ,i);
						f_pos = i;
						j = 0;
						x = 1;
					}
				}
				else {
					printf("No se encontro igualdad en i->%i(%c) == j->%i(%c)",i ,string[i], j, first[j]);
					j = 0;
				}
			}
			else {
				if(*string[i] == *second[j]) { // also here
					j++;
					if(j == l_second) {
						s_pos = i-l_second;
						l_middle = s_pos-f_pos;
						middle = malloc(sizeof(t)*(l_middle+1));
						for(x=0;x<l_middle;x++) {
							*middle[x] == *string[f_pos];
							f_pos++;
						}
						*middle[l_middle+1] = '\0';
						return middle; // is it middle well returned?
					}
				}
				else {
					j = 0;
				}
			}
		}
	return 0; // return 0 if nothing was found
}

if(*string[i] == *first[j]) { //trouble here

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

int main() {
	char string[]="<h1>Example</h1>",*tok;
	tok=strtok(string,"<>");
	printf("%s\n",tok);
	while ((tok=strtok(NULL,"<>"))) printf("%s\n",tok);
        printf("Now string=%s\n",string);
	return 0;	
}

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

void tagsout (char *ptr) {
	int len = strlen(ptr), i, j=0, tag=0; /* "tag" is a flag */
	char tmp[len];
	for (i=0; i<len; i++) {
		if (ptr[i]=='<') tag=1;
		if (ptr[i]=='>') { tag=0; continue; }
		if (tag) continue;  /* flag is set, so skip */
		tmp[j]=ptr[i]; j++;  /* or add to tmp and advance j counter */
	}
	tmp[j]='\0'; /* null terminate replacement */
	strcpy(ptr,tmp);
}
		

int main() {
	char string[]="<div class=\"this\"><p>Hello</p><center><h1>Example</h1></center></div>";
	tagsout(string);
	printf("%s\n",string);
	return 0;	
}

					if(j == l_second) {
						s_pos = i-l_second;
						l_middle = s_pos-f_pos;
						printf("J(%i) = l_second(%i) s_pos = %i , f_pos = %i , l_middle = %i \n",j ,i, s_pos, f_pos, l_middle);
						int test;
						test = sizeof(t)*(l_middle+1);
						printf("test = %i \n", test);
						middle = malloc((sizeof(t))*(l_middle+1));
						if(middle == NULL) {
							printf("No se alloco \n");
							exit(1);
						}
						for(x=0;x<l_middle;x++) {
							middle[x] == string[f_pos];
							f_pos++;
						}
						middle[l_middle+1] = '\0';
						printf("Termina middle = %s \n", middle);
						return middle;
					}

middle[x] = string[f_pos];