我目前正在使用visual Studio在c ++中编写我的第一个游戏(Snake),我试图在屏幕上的随机区域设置你吃的块但是当我使用rand()函数时它说它是未定义的,是吗有人知道为什么我有这个错误吗?
#include <iostream>
using namespace std;
bool gameOver;
const int WIDTH = 20;
const int HEIGHT = 20;
int x, y, foodX, foodY, score;
enum eDirection { STOP = 0, LEFT, RIGHT, UP, DOWN};
eDirection dir;
void Setup(){
gameOver = false;
dir = STOP;
x = WIDTH /2;
y = HEIGHT /2;
//rand function below is not defined??
//I thought the function was built in
foodX = rand() % WIDTH;
foodY = rand() % HEIGHT;
}
void Draw() {
}
void Input() {
}
void Logic() {
}
int main()
{
Setup();
while (!gameOver)
{
Draw();
Input();
Logic();
}
return 0;
}
答案 0 :(得分:3)
答案 1 :(得分:1)
rand
中定义了 cstdlib
,因此您需要添加以下内容:
#include <cstdlib>