voids not being read - c++

Question

I'm working on an Arena-ish console game. I want it so that I can have a void to make you fight certain monsters, instead of having to the monster fight out every time. Here's my code:
#include <iostream>
#include <conio.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <fstream>
using namespace std;
char select;
int randnum;
int level=1;
int maxhp=10;
int hp=maxhp;
int mhp;
int exp;
int dmg;
int m_maxhp;
int req_exp=10;
int day;
char boot;
int a;
ifstream leveli;
ofstream levelo;
ifstream playerhpi;
ofstream playerhpo;
ifstream expi;
ofstream expo;
ifstream maxhpi;
ofstream maxhpo;
ifstream req_expi;
ofstream req_expo;
ifstream dayi;
ofstream dayo;
void wait( time_t delay )
{
time_t timer0, timer1;
time( &timer0 );
do {
time( &timer1 );
} while (( timer1 - timer0 ) < delay );
}
// This is the void that's not being called
void bat()
{
m_maxhp=10;
mhp=m_maxhp;
do{
dmg= rand() % 4 + 1;
cout << "Batt attacks you for " << dmg;
hp=hp-dmg;
cout << ", leaving you with [" << hp << "/" << maxhp << "]" << endl;
wait(1);
if(hp<=0)
{
cout << "You've lose. Try harder next time.";
exp=exp/2;
day=day+1;
dayo.open("daynumber.dat");
dayo << day;
dayo.close();
}
else if(mhp<=0)
{
cout << "You have killed the Bat. You gain 6 EXP." << endl;
exp=exp+6;
day=day+1;
dayo.open("daynumber.dat");
dayo << day;
dayo.close();
expo.open("experience.dat");
expo << exp;
expo.close();
}
}while(mhp>0);
}
int main()
{
leveli.open("level.dat");
leveli >> level;
leveli.close();
playerhpi.open("health.dat");
playerhpi >> hp;
playerhpi.close();
expi.open("experience.dat");
expi >> exp;
expi.close();
maxhpi.open("maxhealth.dat");
maxhpi >> maxhp;
maxhpi.close();
req_expi.open("req_exp.dat");
req_expi >> req_exp;
req_expi.close();
cout << "Data successfully loaded. Start the game now? y/n" << endl;
boot=_getch();
if(boot=='n')
{
cout << "Exiting..." << endl;
wait(3);
exit(0);
}
else if(boot=='y'){
do{
if (exp==req_exp)
{
level=level+1;
cout << "Level Up! You are now level " << level << "!" << endl;
exp=0;
req_exp=req_exp*1.5;
req_expo.open("req_exp.dat");
req_expo << req_exp;
req_expo.close();
levelo.open("level.dat");
levelo << level;
levelo.close();
}
else{
cout << endl << "Day " << day << " in The Arena." << endl << "1. Fight" << endl << "2. Stats" << endl << "3. Full Heal" << endl << "4. Half Heal" << endl;
select=_getch();
if(select=='1')
{
srand((unsigned)time(0));
randnum = rand() % 500 + 1;
// cout << "*DEBUG* " << randnum << endl;
// This part doesn't work
if(randnum<300 && level<4)
{
cout << "You've been chosen to fight a Bat!" << endl;
wait(1.5);
void bat();
}
else
{
}
}
else if(select=='2')
{
cout << endl << "Health: [" << hp << "/" << maxhp << "]" << endl << "Level: [" << level << "]" << endl << "Experience: " << "[" << exp << "/" << req_exp << "]" << endl;
wait(0.5);
}
else
{
cout << "Invalid Command";
}
}
}while (boot=='y');
}
return 0;
}
Am I using voids incorrectly? If so, could someone point out what I should change?

Answer 1

if(randnum<300 && level<4)
{
cout << "You've been chosen to fight a Bat!" << endl;
wait(1.5);
void bat(); // ?
}
What is expected behavior here? void bat(); is a function declaration. This just introduces the name bat and does nothing else. It doesn't call a function named bat. In case you need just to call bat, you should write:
bat(); // a call to "bat"

Answer 2

When you call the function, you omit the return type, e.g. your code:
// This part doesn't work
if(randnum<300 && level<4)
{
cout << "You've been chosen to fight a Bat!" << endl;
wait(1.5);
void bat();
...
Should read:
// This part doesn't work
if(randnum<300 && level<4)
{
cout << "You've been chosen to fight a Bat!" << endl;
wait(1.5);
bat();
...