path: root/funcptrptr.c

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

int doub(int);
int trip(int);
int half(int);
void fpv_exec(int (**fpv)(int), int n);
void fpvv_exec(int (***fpvv)(int), int n);
void fpvvv_exec(int (****fpvvv)(int), int n);

int doub(int i) {
	return i * 2;
}

int trip(int i) {
	return i * 3;
}

int half(int i) {
	return i / 2;
}

void fpv_exec(int (**fpv)(int), int n) {
	int i;
	for (i = 0; *(fpv + i) != NULL; i++) {
		printf("%d\n", (*(fpv + i))(n));
	}
}

void fpvv_exec(int (***fpvv)(int), int n) {
	int i;
	for (i = 0; *(fpvv + i) != NULL; i++) {
		fpv_exec(*(fpvv + i), n);
	}
}

void fpvvv_exec(int (****fpvvv)(int), int n) {
	int i;
	for (i = 0; *(fpvvv + i) != NULL; i++) {
		fpvv_exec(*(fpvvv + i), n);
	}
}

int main(int argc, char **argv) {
	int (****fpvvv)(int);
	fpvvv = calloc(2, sizeof(int (***)(int)));

	fpvvv[0] = calloc(2, sizeof(int (**)(int)));
	fpvvv[1] = calloc(2, sizeof(int (**)(int)));

	fpvvv[0][0] = calloc(4, sizeof(int (*)(int)));
	fpvvv[0][1] = calloc(4, sizeof(int (*)(int)));
	fpvvv[1][0] = calloc(4, sizeof(int (*)(int)));
	fpvvv[1][1] = calloc(4, sizeof(int (*)(int)));

	fpvvv[0][0][0] = doub;
	fpvvv[0][0][1] = trip;
	fpvvv[0][0][2] = half;
	fpvvv[0][0][3] = NULL;
	fpvvv[0][1][0] = doub;
	fpvvv[0][1][1] = trip;
	fpvvv[0][1][2] = half;
	fpvvv[0][1][3] = NULL;
	fpvvv[1][0][0] = doub;
	fpvvv[1][0][1] = trip;
	fpvvv[1][0][2] = half;
	fpvvv[1][0][3] = NULL;
	fpvvv[1][1][0] = doub;
	fpvvv[1][1][1] = trip;
	fpvvv[1][1][2] = half;
	fpvvv[1][1][3] = NULL;

	for (argv++, argc--; argc; argv++, argc--) {
		fpvvv_exec(fpvvv, atoi(*argv));
	}

	exit(EXIT_SUCCESS);
}