For循環無法正常運行

Question

我一直試圖在C.

這一切都被工作完全正常，除了實際的加密循環計數器來創建一個密碼生成。它總是停在大約39處。強制它進一步，只會導致出現一些隨機的ASCII符號，而不是A-Z。 （對不起，我無法描述它特別好。）

#include <stdio.h> 
#include <stdlib.h> /* For exit() function*/ 
#include <time.h> 

#define SIZE 26 
int main(){ 

    char plainAlphabet[27] = {'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z',' '}; 

    char cipherAlphabet[27]; 
    char plainText[] = "THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG"; 

    int x = 0; 
    int c = 0; 

    int numbers[SIZE]; 
    int i, n, tmp; 

    srand(time(NULL)); 

// Initialize the array 
    for(i = 0;i < SIZE;++i) 
    numbers[i] = i; 

// Shuffle the array 
    for(i = 0;i < SIZE;++i) 
    { 
     n = rand() % SIZE; 
     tmp = numbers[n]; 
     numbers[n] = numbers[i]; 
     numbers[i] = tmp; 
    } 

// Iterate through the array. Your numbers are already random 
    for(i = 0;i < SIZE;++i){ 
     cipherAlphabet[i] = plainAlphabet[numbers[i]]; 
    }; 
    int a = 0; 
    x = 0; 
    i = 0; 

    int z = strlen(plainText); 
    printf("%d\n",z); 
    for(plainText[x] != "^";c < z + 100; c++){ 

     if(plainAlphabet[c] == plainText["%d",x]){ 
      printf("%c",cipherAlphabet[c]); 
      a = a + 1; 
      x = x + 1; 
      c = 0; 
     }; 

    }; 
    printf("%d",c); 
    printf("%d",z); 
    scanf("%d", tmp); 
    return 0; 
} 

（很抱歉，如果這似乎是顯而易見的和/或重複。）

Answer 1

所以終於來了！它應該工作！你的主要/最大的錯誤是在你最後的for循環中設置c到0！

因爲在將其設置爲0之後，它會增加1，但在您的plainAlphabet 'A'中是index 0！因此，如果您的文本包含A's程序在那裏停止，因爲c它永遠不會得到0和A會在您的plainAlphabet找到nerver！ （解決方法：設置C爲-1 |在我的例子c是arrayCount）

（你也必須在你的代碼的一些奇怪的錯誤！）

#include <stdio.h> 
#include <stdlib.h> /* For exit() function*/ 
#include <time.h> 
#include <string.h> 

#define SIZE 26 


int main() { 

    char plainAlphabet[27] = {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', ' '}; 
    char cipherAlphabet[50]; 
    char plainText[255] = "THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG"; 

    int arrayCount, randomNumber, swap, charCount = 0, strLength = strlen(plainText); 
    int numbers[SIZE]; 


    srand(time(NULL)); 

    // Initialize the array 
    for(arrayCount = 0; arrayCount < SIZE; arrayCount++) 
     numbers[arrayCount] = arrayCount; 

    // Shuffle the array 
    for(arrayCount = 0; arrayCount < SIZE; arrayCount++) { 
     randomNumber = rand() % SIZE; 
     swap = numbers[randomNumber]; 
     numbers[randomNumber] = numbers[arrayCount]; 
     numbers[arrayCount] = swap; 
    } 

    // Iterate through the array. Your numbers are already random 
    for(arrayCount = 0; arrayCount < SIZE; arrayCount++) 
     cipherAlphabet[arrayCount] = plainAlphabet[numbers[arrayCount]]; 


    printf("String Length: %d\n\n", strLength); 
    printf("Encrypted Text: \n"); 
    charCount = 0; 

    for(arrayCount = 0; arrayCount < strLength; arrayCount++) { 

     if(plainAlphabet[arrayCount] == plainText[charCount] && plainText[arrayCount] != '^') { 

      printf("%c", cipherAlphabet[arrayCount]); 
      charCount += 1; 
      arrayCount = -1; 
     } 

     if(plainText[charCount] == '\0') 
      break; 

    } 

    int a = 0; //If this variable is commented out, the program gives other results 

    printf("\n\n"); 
    system("pause"); 


    return 0; 

}