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| #include <stdio.h>
#include <stdlib.h> /* srand, rand */
#include <time.h> /* time */
#define TAB_NB_ELEMENTS 10
typedef void (*t_callback) (int* /*result*/);
/* forward declarations - private functions */
void p_tab_display(int* /*tab*/, size_t /*index*/, size_t /*nb_elements*/);
void p_tab_fill(
int* /*tab*/,
size_t /*index*/,
size_t /*nb_elements*/,
t_callback /*func_get_value*/);
void p_tab_reverse(int* /*tab*/, size_t /*start_index*/, size_t /*end_index*/);
void p_tab_reverse_display(int* /*tab*/, size_t /*index*/, size_t /*nb_elements*/);
int p_tab_sum(int* /*tab*/, size_t /*index*/, size_t /*nb_elements*/);
/* callback functions and global */
static int g_value = 0;
void callback_add_one(int* result) {
// if (init_value != NULL) {
(*result) = g_value;
++g_value;
// }
}
void callback_get_g_value(int* result) {
// if (init_value != NULL) {
(*result) = g_value;
// }
}
void callback_get_zero(int* result) {
// if (init_value != NULL) {
(*result) = 0;
// }
}
void init_g_value(int init_value) {
g_value = init_value;
}
/* public functions */
void tab_display(int* tab, size_t nb_elements) {
if ((tab != NULL) && (nb_elements > 0)) {
p_tab_display(tab, 0, nb_elements);
}
}
void tab_fill(
int* tab,
size_t nb_elements,
t_callback func_get_value) {
if ((tab != NULL) && (nb_elements > 0) && (func_get_value != NULL)) {
p_tab_fill(tab, 0, nb_elements, func_get_value);
}
}
void tab_reverse(int* tab, size_t nb_elements) {
if ((tab != NULL) && (nb_elements > 1)) {
p_tab_reverse(tab, 0, (nb_elements - 1));
}
}
void tab_reverse_display(int* tab, size_t nb_elements) {
if ((tab != NULL) && (nb_elements > 0)) {
p_tab_reverse_display(tab, 0, nb_elements);
}
}
unsigned char tab_sum(int* tab, size_t nb_elements, int* result) {
unsigned char ret;
if ((tab != NULL) && (nb_elements > 0)) {
(*result) = p_tab_sum(tab, 0, nb_elements);
ret = 1;
} else {
ret = 0;
}
return ret;
}
/* private functions - no need to test the input parameters */
void p_tab_display(int* tab, size_t index, size_t nb_elements) {
if (index < nb_elements) {
printf("%d | ", (*tab));
p_tab_display((tab + 1), (index + 1), nb_elements);
} else {
printf("\n");
}
}
void p_tab_fill(
int* tab,
size_t index,
size_t nb_elements,
t_callback func_get_value) {
func_get_value(tab);
if (index < nb_elements) { p_tab_fill((tab + 1), (index + 1), nb_elements, func_get_value); }
}
void p_tab_reverse(int* tab, size_t start_index, size_t end_index) {
if (start_index < end_index) {
int temp;
temp = tab[end_index];
tab[end_index] = tab[start_index];
tab[start_index]= temp;
p_tab_reverse(tab, (start_index + 1), (end_index - 1));
}
}
void p_tab_reverse_display(int* tab, size_t index, size_t nb_elements) {
if (index < nb_elements) {
p_tab_reverse_display((tab + 1), (index + 1), nb_elements);
printf("%d | ", (*tab));
}
if (index == 0) { printf("\n"); }
}
int p_tab_sum(int* tab, size_t index, size_t nb_elements) {
return ((index < nb_elements)? ((*tab) + p_tab_sum((tab + 1), (index + 1), nb_elements)): 0);
}
int main(int argc, char* argv[])
{
int tab[TAB_NB_ELEMENTS];
int result;
/*****************************************************************************/
tab_fill(tab, TAB_NB_ELEMENTS, callback_get_zero);
tab_display(tab, TAB_NB_ELEMENTS);
tab_reverse_display(tab, TAB_NB_ELEMENTS);
if ( tab_sum(tab, TAB_NB_ELEMENTS, &result) ) {
printf("Sum zero : %d\n\n", result);
} else {
printf("Sum zero : [error]\n\n");
}
/*****************************************************************************/
init_g_value(24);
tab_fill(tab, TAB_NB_ELEMENTS, callback_add_one);
tab_display(tab, TAB_NB_ELEMENTS);
tab_reverse_display(tab, TAB_NB_ELEMENTS);
if ( tab_sum(tab, TAB_NB_ELEMENTS, &result) ) {
printf("Sum : %d\n\n", result);
} else {
printf("Sum : [error]\n\n");
}
/*****************************************************************************/
tab_reverse(tab, TAB_NB_ELEMENTS);
tab_display(tab, TAB_NB_ELEMENTS);
if ( tab_sum(tab, TAB_NB_ELEMENTS, &result) ) {
printf("Sum reverse : %d\n\n", result);
} else {
printf("Sum reverse : [error]\n\n");
}
/*****************************************************************************/
/* initialize random seed */
srand (time(NULL));
/* range 1 to 999 */
init_g_value(1 + (rand() % 999));
tab_fill(tab, TAB_NB_ELEMENTS, callback_get_g_value);
tab_display(tab, TAB_NB_ELEMENTS);
if ( tab_sum(tab, TAB_NB_ELEMENTS, &result) ) {
printf("Sum pow : %d\n\n", result);
} else {
printf("Sum pow : [error]\n\n");
}
return 0;
} |
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