1 files changed, 54 insertions, 0 deletions
diff --git a/comp/work/58/example.c b/comp/work/58/example.c
new file mode 100644
index 0000000..1fb81b8
--- /dev/null
+++ b/comp/work/58/example.c
@@ -0,0 +1,54 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+typedef enum op {
+	ADD,
+	SUB,
+	MUL,
+	DIV,
+} op;
+
+struct operation {
+	int a, b;
+	op o; 
+	int (*funcs[2][2])(int, int);
+};
+
+int add(int a, int b) {
+	return a + b;
+}
+int sub(int a, int b) {
+	return a - b;
+}
+int mul(int a, int b) {
+	return a * b;
+}
+int Div(int a, int b) {
+	return a / b;
+}
+
+int runop(struct operation *o) {
+	switch (o->o) {
+		case ADD: return o->funcs[0][0](o->a, o->b);
+		case SUB: return o->funcs[0][1](o->a, o->b);
+		case MUL: return o->funcs[1][0](o->a, o->b);
+		case DIV: return o->funcs[1][1](o->a, o->b);
+	}
+	return -1;
+}
+
+struct operation *initop(int a, int b, op ope) {
+	struct operation *o = malloc(sizeof(struct operation));
+	o->a = a;
+	o->b = b;
+	o->funcs[0][0] = &add;
+	o->funcs[0][1] = &sub;
+	o->funcs[1][0] = &mul;
+	o->funcs[1][1] = &Div;
+	o->o = ope;
+}
+
+int main() {
+	struct operation *o = initop(5, 5, MUL);
+	printf("%d\n", runop(o));
+}