# 程式設計小專題—電子雞自己猜數字
## 改寫過的程式碼
```cpp=
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
void guessGame(void); //遊戲的函式
void ascii(void); //圖案的函式
int isCorrect(int, int); //猜測結果回報
int hrange = 1000; //範圍最大值
int lrange = 1; //範圍最小值
//主函式
int main(void){
guessGame();
}
//執行遊戲的函式
void guessGame(void){
int answer; //正確答案
int guess; //猜測的答案
int response; //是否要繼續的選擇
int times = 0; //猜的次數
do{
answer = 1 + rand() % 1000; //1~1000隨機挑一個數字當正確答案
//印出問題
puts("I have a number between 1 and 1000.\n"
"Can you guess my number?\n"
"Please type your first guess.");
guess = (hrange + lrange) / 2; //從中間值開始猜
printf("\nAnswer is %d\n", guess);
times = times + 1; //猜一次次數加1
//讓電腦自己猜數字
while (!isCorrect(guess, answer)) //答案是錯的持續執行迴圈
{
guess = (hrange + lrange) / 2;
printf("\nAnswer is %d\n", guess);
times = times + 1; //猜一次次數加1
}
//完成猜測
printf("\nExcellent! You guessed the number!\n\n");
ascii(); //印出圖案
printf("\nUse %d times to guess\n",times); //說明猜了幾次
printf("Would you like to play again?\n");
printf("%s", "Please type ( 1=yes, 2=no )? \n");
scanf("%d", &response);
lrange = 1;
hrange = 1000;
times = 0;
puts("");
}
while (response == 1);
}
//猜測結果的函式
int isCorrect(int guess, int answer)
{
//回答正確
if (guess == answer)
return 1;
//回答錯誤
if (guess < answer){
printf( "%s", "\nToo low. Try again.\n" ); //如果猜的數字比正確數字小
lrange = guess + 1;
}
else if (guess > answer){
printf( "%s", "\nToo high. Try again.\n" ); //如果猜的數字比正確數字大
hrange = guess - 1;
}
return 0;
}
//最後的成功(？圖案的函式
void ascii (void){
printf("__________________???????????????_________________\n");
printf("_________________?????????????????________________\n");
printf("____________???????????????????????????___________\n");
printf("___________???????_______________???????__________\n");
printf("________?????_________________________?????_______\n");
printf("_______?????___________________________?????______\n");
printf("_____????_________________________________????____\n");
printf("_____????_________________________________????____\n");
printf("_____????_____???????_________???????_____????____\n");
printf("____???_______???????_________???????_______??????\n");
printf("__????________???????_________???????_________????\n");
printf("__????________________________________________????\n");
printf("__????________________________________________????\n");
printf("__????________________________________________????\n");
printf("__????________________________________________????\n");
printf("__????________________________________________????\n");
printf("__????______?_________________________?_______????\n");
printf("__????_____????_____________________????______????\n");
printf("____???_____?????_________________?????_____??????\n");
printf("_____????_____????_______________????_____????____\n");
printf("_____????_______???????????????????_______????____\n");
printf("_____????_________???????????????_________????____\n");
printf("_______?????___________________________?????______\n");
printf("________?????_________________________?????_______\n");
printf("___________???????_______________???????__________\n");
printf("____________??????_______________??????___________\n");
printf("__________________???????????????_________________\n");
printf("__________________???????????????_________________\n");
}
```
### 說明
每次都從中間值開始猜，這樣速度比較快。
```cpp=
int hrange = 1000; //範圍最大值
int lrange = 1; //範圍最小值
```
最一開始先宣告全域變數，設定範圍最大值=1000以及最小值=1。
#### 執行遊戲的函式
```cpp=
void guessGame(void){
int answer; //正確答案
int guess; //猜測的答案
int response; //是否要繼續的選擇
int times = 0; //猜的次數
```
先宣告正確答案跟電腦猜測的答案，總猜測次數先宣告為0。
```cpp=
do{
answer = 1 + rand() % 1000; //1~1000隨機挑一個數字當正確答案
//印出問題
puts("I have a number between 1 and 1000.\n"
"Can you guess my number?\n"
"Please type your first guess.");
guess = (hrange + lrange) / 2; //從中間值開始猜
printf("\nAnswer is %d\n", guess);
times = times + 1; //猜一次次數加1
//讓電腦自己猜數字
while (!isCorrect(guess, answer)) //答案是錯的持續執行迴圈
{
guess = (hrange + lrange) / 2;
printf("\nAnswer is %d\n", guess);
times = times + 1; //猜一次次數加1
}
```
一開始先有一個在1~1000之間隨機選一個數字當作正確答案。
第一次猜的數字就從中間值開始猜起，每猜測一次次數的計算就會+1。
然後把猜測的數字用判斷猜測結果的函式判斷是否正確。
若不正確即在猜一次，直到猜對為止。
#### 判斷猜測結果的函式
```cpp=
//判斷猜測結果的函式
int isCorrect(int guess, int answer)
{
//回答正確
if (guess == answer)
return 1;
//回答錯誤
if (guess < answer){
printf( "%s", "\nToo low. Try again.\n" ); //如果猜的數字比正確數字小
lrange = guess + 1;
}
else if (guess > answer){
printf( "%s", "\nToo high. Try again.\n" ); //如果猜的數字比正確數字大
hrange = guess - 1;
}
return 0;
}
```
此為判斷猜測結果的函式。
猜對即回傳1(true)。
若猜錯有兩種可能，一個是猜的數字比正確答案還小，若是這種情況，則猜測範圍最小值應從猜的答案加1開始;另一個是猜的數字比正確答案大，那麼此猜測範圍最大值應從猜的答案減1開始。
#### 成功時印出的圖案的程式碼
```cpp=
void ascii (void){
printf("__________________¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶_________________\n");
printf("_________________¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶________________\n");
printf("____________¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶___________\n");
printf("___________¶¶¶¶¶¶¶_______________¶¶¶¶¶¶¶__________\n");
printf("________¶¶¶¶¶_________________________¶¶¶¶¶_______\n");
printf("_______¶¶¶¶¶___________________________¶¶¶¶¶______\n");
printf("_____¶¶¶¶_________________________________¶¶¶¶____\n");
printf("_____¶¶¶¶_________________________________¶¶¶¶____\n");
printf("_____¶¶¶¶_____¶¶¶¶¶¶¶_________¶¶¶¶¶¶¶_____¶¶¶¶____\n");
printf("____¶¶¶_______¶¶¶¶¶¶¶_________¶¶¶¶¶¶¶_______¶¶¶¶¶¶\n");
printf("__¶¶¶¶________¶¶¶¶¶¶¶_________¶¶¶¶¶¶¶_________¶¶¶¶\n");
printf("__¶¶¶¶________________________________________¶¶¶¶\n");
printf("__¶¶¶¶________________________________________¶¶¶¶\n");
printf("__¶¶¶¶________________________________________¶¶¶¶\n");
printf("__¶¶¶¶________________________________________¶¶¶¶\n");
printf("__¶¶¶¶________________________________________¶¶¶¶\n");
printf("__¶¶¶¶______¶_________________________¶_______¶¶¶¶\n");
printf("__¶¶¶¶_____¶¶¶¶_____________________¶¶¶¶______¶¶¶¶\n");
printf("____¶¶¶_____¶¶¶¶¶_________________¶¶¶¶¶_____¶¶¶¶¶¶\n");
printf("_____¶¶¶¶_____¶¶¶¶_______________¶¶¶¶_____¶¶¶¶____\n");
printf("_____¶¶¶¶_______¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶_______¶¶¶¶____\n");
printf("_____¶¶¶¶_________¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶_________¶¶¶¶____\n");
printf("_______¶¶¶¶¶___________________________¶¶¶¶¶______\n");
printf("________¶¶¶¶¶_________________________¶¶¶¶¶_______\n");
printf("___________¶¶¶¶¶¶¶_______________¶¶¶¶¶¶¶__________\n");
printf("____________¶¶¶¶¶¶_______________¶¶¶¶¶¶___________\n");
printf("__________________¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶_________________\n");
printf("__________________¶¶¶¶¶¶¶¶¶¶¶¶¶¶¶_________________\n");
}
```
> replit link :https://replit.com/@angle930325/Xiao-Zhuan-Ti-Dian-Zi-Ji-Zi-Ji-Cai-Shu-Zi#main.c
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