C++ user input twice before specified response - c++

Question

I am making a whack-a-mole game for my class but I am stuck on the basic controls. I setup a basic board, using an array with a border using ascii symbols, with O representing the holes and X the hammer. When I go to move the hammer, lets say to the right, I have to press it twice for the hammer to move and I don't know why. It has to go through the whole loop 2 times before moving the hammer the right way.
#include <iostream>
#include <windows.h>
using namespace std;
bool gamerunning = true;
const int num = 20; //width
const int num2 = 40; //height
int x, y, score, perx, pery;
int hole1x, hole1y;
int hole2x, hole2y;
int hole3x, hole3y;
int hole4x, hole4y;
void setup(){
x= 5;
y=5;
hole1x = 15;
hole1y = 5;
hole2x = 15;
hole2y = 10;
hole3x = 25;
hole3y = 5;
hole4x = 25;
hole4y = 10;
score = 0;
perx = 15;
pery = 6;
}
//creating board
void draw(){
system("cls");
int i,j;
char Layout[num][num2];
for (i=0;i<num;i++){
for (j=0;j<num2;j++){
//boarder for play area
if (i==0 && j==0) //Top Left
Layout [i][j] = 201;
else if( i==0 && j==num2-1) //top right
Layout [i][j] = 187;
else if(i==num-1 && j==0) //bottom left
Layout [i][j] = 200;
else if(i ==num-1 && j==num2-1) //bottom right
Layout [i][j] = 188;
else if (i==0 || i==num - 1)
Layout[i][j]=205;
else if(j==0 || j==num2-1)
Layout [i][j] = 186;
else
Layout[i][j]=' ';
//holes
if(i == hole1y && j == hole1x)
Layout[i][j]= 'O';
if(i == hole2y && j == hole2x)
Layout[i][j]= 'O';
if(i == hole3y && j == hole3x)
Layout[i][j]= 'O';
if(i == hole4y && j == hole4x)
Layout[i][j]= 'O';
//character
if(i == pery && j == perx)
Layout[i][j]= 'X';
cout << Layout[i][j];
}
cout << endl;
}
}
void input(){
if(GetAsyncKeyState(VK_RIGHT)){
if(perx<=15)
perx +=10;
}
if(GetAsyncKeyState(VK_LEFT)){
if(perx>=25)
perx -=10;
}
if(GetAsyncKeyState(VK_DOWN)){
if(pery<=10)
pery +=5;
}
if(GetAsyncKeyState(VK_UP)){
if(pery>=10)
pery -=5;
}
if(GetAsyncKeyState(VK_ESCAPE)){
gamerunning = false;
}
}
void logic(){
}
int main(){
setup();
while(gamerunning == true){
draw();
input();
logic();
system("pause>nul");
}
system("cls");
cout << "GAME OVER" << endl;
return 0;
}

Answer 1

Here :
while(gamerunning == true)
{
draw();
input();
system("pause>nul");
logic();
}
You first draw your game board then you get the input, drawing will not happen until the next time loop execution, so your drawing will not update.
You need to put first draw call outside the loop (for initial drawing) then inside the loop call draw after input. like this :
draw();
while(gamerunning == true)
{
input();
draw();
system("pause>nul");
logic();
}