在C程序中猜字遊戲，困惑錯誤

Question

我想通過使用Visual Studio 2012來做一個猜測C語言遊戲的字母，但是我不斷收到錯誤和警告，我不知道如何解決它們。我不斷收到的錯誤是：

1）警告1警告C4133： '功能'：不兼容的類型 - 從 'FILE *' 到 '爲const char *'

2）警告2警告C4047： '='：'FILE *'與'int（__cdecl *）（FILE *）'的間接級別不同'

3）錯誤3錯誤C2449：在文件範圍發現'{'（缺少函數頭？

4.）錯誤4錯誤C1004：意外結束文件中找到

5.）智能感知：argum類型的 「FILE *」 ENT是與參數不相容

6.）智能感知：類型爲 「int（__cdecl *）（FILE * _File）」 不能被分配給類型的實體 「FILE *」

的值

我也看到錯誤，說'預計一個聲明。'每當我嘗試解決問題時，我最終都會在其他方面引發更多問題。有人可以幫我嗎？謝謝！

這裏是我的代碼：

#define _CRT_SECURE_NO_WARNINGS 1 
#include <stdio.h> 
#define MAXGUESSES 5 

int SingleGame(char file_letter); 

int main() 
{ 
    //declare additional variables 
int PlayGames = 4, 
i = 0; 
FILE * infile; 
char letter; 
    //display instructions 
    printf("Welcome to the Letter Guessing Game!\n"); 
    printf("You will enter the number of games that you want to play, which is 1-4 games\n"); 
    printf("You have 5 chances to guess each letter\n"); 
    printf("Let's begin!\n"); 

    //open file 
    infile = fopen("lettersin.txt", "r"); 

    //get number of games to play 
    printf("How many games would you like to play?(1-4)\n"); 
    scanf("%d", &PlayGames); 

    for(i=0;i<PlayGames;i++) 
    { 
     //get a letter from file 
     scanf(infile, " %c", &letter); 

     //Play one game 
     printf("Let's play a game %d\n", i); 

     //check for win or lose 
     SingleGame (letter); 
    } 

    //close file 
    infile = fclose; 
    return 0; 
} 
int SingleGame(char file_letter); 
{ 

//Function definitions 
    int numGuesses = 0; 
    while(numGuesses < MAXGUESSES); 
    char RetrieveGuess = 0; 
    int PlayGames = 0; 

    { 
     printf("Enter a guess\n"); 
     scanf("%c" , &RetrieveGuess); 
     if(file_letter == RetrieveGuess); 
     { 
      printf("You guessed it!\n"); 
     } 
     else 
     { 
      if(file_letter>RetrieveGuess) 
      { 
       printf("The letter you are trying to guess comes before:%d\n",RetrieveGuess) 
      } 
      { 
      else if(file_letter<RetrieveGuess) 
      { 
       printf("The letter you are trying to guess comes after:%d\n", RetrieveGuess) 
      } 


      { 
      numGuesses = numGuesses +1; 
      } 

Answer 1

1）警告1警告C4133： '功能'：不兼容的類型 - 從 'FILE *' 到 '爲const char *'

scanf(infile, " %c", &letter); 

如果你想從一個特定的FILE *閱讀，使用fscanf()：

fscanf(infile, " %c", &letter); 

2）警告2警告C4047： '='： 'FILE *' 在間接的水平不同於 'INT（__cdecl *）（FILE *）'

infile = fclose; 

你想調用fclose()而不是將其分配給infile（其也沒有兼容型）：

fclose(infile); 

3.）錯誤3錯誤C2449：發現「{」在文件範圍（缺少函數頭？）

int SingleGame(char file_letter); 

分號，使一個函數聲明/ protoype，但你要定義一個。刪除它。

這裏的分號是所謂的null statement）。這意味着如果兩個變量都相等，那麼什麼都不會做。

if(file_letter == RetrieveGuess); 

Answer 2

您在這裏有許多與您的代碼有關的問題。一次處理多個問題總是很困難。我的建議是將所有這些代碼複製到不同的文件中，並且一次只重建一行文件，並且在編譯當前文件錯誤和警告免費之後只添加另一行。

Answer 3

很多語法錯誤都在代碼中。我已經爲你糾正了它們。儘管邏輯上不確定代碼是否正確。你必須跑步，看看。

#define _CRT_SECURE_NO_WARNINGS 1 
#include <stdio.h> 
#define MAXGUESSES 5 

void SingleGame(char file_letter); 

int main() 
{ 
    //declare additional variables 
    int PlayGames = 4, 
    i = 0; 
    FILE* infile; 
    char letter; 
    //display instructions 
    printf("Welcome to the Letter Guessing Game!\n"); 
    printf("You will enter the number of games that you want to play, which is 1-4 games\n"); 
    printf("You have 5 chances to guess each letter\n"); 
    printf("Let's begin!\n"); 

    //open file 
    infile = fopen("lettersin.txt", "r"); 

    //get number of games to play 
    printf("How many games would you like to play?(1-4)\n"); 
    scanf("%d", &PlayGames); 

    for(i=0;i<PlayGames;i++) 
    { 
     //get a letter from file 
     fscanf(infile, " %c", &letter); 

     //Play one game 
     printf("Let's play a game %d\n", i); 

     //check for win or lose 
     SingleGame (letter); 
    } 

    //close file 
    fclose(infile); 
    return 0; 
} 

void SingleGame(char file_letter) 
{ 
//Function definitions 
    int numGuesses = 0; 
    while(numGuesses < MAXGUESSES) 
    { 
     char RetrieveGuess = 0; 
     int PlayGames = 0; 

     printf("Enter a guess\n"); 
     scanf("%c" , &RetrieveGuess); 
     if(file_letter == RetrieveGuess) 
     { 
      printf("You guessed it!\n"); 
     } 
     else 
     { 
      if(file_letter>RetrieveGuess) 
      { 
       printf("The letter you are trying to guess comes before:%d\n",RetrieveGuess); 
      } 
      else if(file_letter<RetrieveGuess) 
      { 
       printf("The letter you are trying to guess comes after:%d\n", RetrieveGuess); 
      } 

      numGuesses = numGuesses +1; 
     } 
    } 
}