程序代码：

#include<stdio.h>
#include<time.h>
#include<stdlib.h>
#include<windows.h>
void creat_food();
char tn = 3;
struct Snake
{
    int x;
    int y;
};
void gotoxy(int x,int y);
void main()     //主函数
{
    creat_food();
}
void creat_food()   //产生食物
{
    struct Snake * food;
    srand(time(NULL));
    food -> x = rand()%38+1;
    food -> y = rand()%13+1;
    gotoxy(food -> x,food -> y);
    printf("%c",tn);
}
void gotoxy(int x,int y)  //移动光标
{
    HANDLE hOut=GetStdHandle(STD_OUTPUT_HANDLE);
    COORD loc={x,y};
    SetConsoleCursorPosition(hOut,loc);
}