char[] replace(char* str, char find, char* subs) {
int i, l = 0;
while (str[l] != '\0')
l++;
char[l+1] string;
for (i=0; i<l+1; i++) {
if (str[i] == find) {
string[i] = subs[0];
string[++i] = subs[1];
} else {
string[i] = str[i];
}
}
return string;
}
prova a compilarlo :sexpulp: