Making vectors of vectors

3 files changed, 81 insertions, 2 deletions

diff --git a/.gitignore b/.gitignore
index d547342..be02820 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 funcptr
+funcptrptr
diff --git a/Makefile b/Makefile
index 74fe256..87db275 100644
--- a/Makefile
+++ b/Makefile
@@ -3,7 +3,7 @@
 CC = clang
 CFLAGS = -std=c90 -Weverything
 
-all : funcptr
+all : funcptr funcptrptr
 
 clean :
-	rm -f funcptr
+	rm -f funcptr funcptrptr
diff --git a/funcptrptr.c b/funcptrptr.c
new file mode 100644
index 0000000..fdc1542
--- /dev/null
+++ b/funcptrptr.c
@@ -0,0 +1,78 @@
+#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);
+}