#include<stdio.h>#include<stdlib.h>#include<time.h>  void fun(int c ){ srand((unsigned)time(NULL)); int ret = rand() % 100 + 1; printf("請輸入一個數>");  while (1) {  scanf("%d", &c);  if (c == ret)  {   printf("正確\n");   break;  }  else if (c > ret)  {   printf("猜大了\n");  }  else   {   printf("猜小了\n");  } }} void menu() {  printf("********************\n");  printf("****游戲開始********\n");  printf("********************\n");  printf("*****請選擇*********\n");  printf("********************\n");  printf("****1 游戲開始******\n");  printf("********************\n");   printf("****2 游戲結束******\n");  printf("********************\n");  printf("********************\n"); }int main(){ int c = 0; int num = 0; int input = 0; while (1) {  menu();  printf("請選擇\n");  scanf("%d", &input);  switch (input)  {  case 1:   printf("游戲開始\n");   fun( num);   break;   {  case 2:   printf("游戲結束\n");   break;   }  }  //break; } printf("%d", c); system("pause"); return 0;