Examen - PC

/*
    Program implementat de Nan Mihai
    Pregatire examen restanta PC - 2014
*/

char *strdel(char *p, int n) {
    char *aux = strdup(p + n);
    strcpy(p, aux);
    return p;
}

char *strins(char *p, char *s) {
    char *aux;
    aux = strdup(p);
    strcpy(p, s);
    strcat(p, aux);
    return p;
}

int main() {
    char text[100], cuv1[100], cuv2[100], *p, *aux;
    gets(text);
    gets(cuv1);
    gets(cuv2);
    p = strstr(text, cuv1);
    while(p)
    {
        aux = p;
        strdel(aux, strlen(cuv1));
        strins(aux, cuv2);
        aux += strlen(cuv2);
        p = strstr(aux, cuv1);
    }
    printf("%s", text);
    return 0;
}