emscripten code which uses a wasm function table

table.cc

#include <stdlib.h>

/* define a dynamic function */
int (*dynamicInt)();

/* import a function from the host */
extern int hostInt();
/* assign it to the next table offset (0) */
int (*hostIntPtr)() = &hostInt;

/* define a function in wasm */
int guestInt() {
    return 42;
}
/* assign it to the next table offset (1) */
int (*guestIntPtr)() = &guestInt;

/* decide which function to use */
int main() {
  dynamicInt = hostIntPtr;
  int num = dynamicInt(); // call indirect table offset 0
  dynamicInt = guestIntPtr;
  num += dynamicInt(); // call indirect table offset 1
  return num;
}