while循环正在执行一个不必要的打印语句

Question

我试图让用户输入一个末尾带有

$

 的单词。我为此使用了 

while

 循环。程序可以运行，但是在最后给出带有 

$

 符号的单词后，

print

 循环内的 

do

 语句会再次执行

#include <stdio.h>
int main(void)
{


   char word[100];                                                          //reading a sting

   printf("Enter the word That ends   with $:");

   
    int space=0;
    int consonant=0;
    int vowel=0;
    char x;
    int count;

                                                    //forcing to put $ at the end of the word

do{
    count=0;
    fgets(word,100,stdin);
    printf("Enter the word That ends   with $:");
 
                                                                            //reading strlen
   for (count ; word[count] != '\0'; count++)
     {

     }
    
} 
  while(word[count-2] != '$');
  
                                      //connverting ti lower case to compare upper and lower                                                                                 case letters                                 
      for(int i=0;i<count-1;i++)
        {

          word[i]=tolower(word[i]);
          printf("%c",word[i]);
        }

                                                                      //checking for vowels
        for(int i=0;i<count;i++)
          {
            if(word[i] == 'a'||
               word[i] == 'e'||
               word[i] == 'i'||
               word[i] == 'o'||
               word[i] == 'u')
            {
              vowel=vowel+1;
            }
                                                                      //checking for spaces
            else if(word[i] == ' ')
            {
              space=space+1;
            }
                                                                  //checking for consonents
            //this works , why?
            else if(word[i]>='a'&&  
                    word[i]<="z")
            { 
              consonant=consonant+1;
            }


          }

                                                                        //output printing
           printf("\n vowel=%d",vowel);
           printf("\n space=%d",space);
           printf("\n consonants=%d",consonant);


         
      


      
      
    }

如何防止这种情况发生？

Answer 1

循环条件：循环条件 while(word[count-2] != '$') 在单词末尾查找 $ 字符。但是，这可能不准确，特别是当输入字符串比预期长时。您可能需要考虑使用不同的方法进行输入验证。

字符比较： 在辅音检查中，您将 word[i] 与字符串“z”进行比较，这是不正确的。您应该将它与字符“z”进行比较。

代码组织：您的代码看起来有点杂乱，尤其是在最后。确保正确构建代码以增强可读性。

    #include <stdio.h>
#include <ctype.h> // Include ctype.h for tolower() function

int main(void) {
    char word[100];
    printf("Enter a word that ends with $: ");

    int space = 0;
    int consonant = 0;
    int vowel = 0;
    int count = 0;

    do {
        fgets(word, 100, stdin);

        // Count the length of the string
        count = 0;
        while (word[count] != '\0' && word[count] != '$') {
            count++;
        }

        // Convert all characters to lowercase
        for (int i = 0; i < count; i++) {
            word[i] = tolower(word[i]);
        }

        // Check for vowels, consonants, and spaces
        for (int i = 0; i < count; i++) {
            if (word[i] == 'a' || word[i] == 'e' || word[i] == 'i' || word[i] == 'o' || word[i] == 'u') {
                vowel++;
            } else if (word[i] == ' ') {
                space++;
            } else if (word[i] >= 'a' && word[i] <= 'z') { // Compare with character 'z'
                consonant++;
            }
        }

        printf("\nVowels: %d", vowel);
        printf("\nSpaces: %d", space);
        printf("\nConsonants: %d\n", consonant);
        
        // Reset counts for next iteration
        vowel = 0;
        space = 0;
        consonant = 0;

        printf("\nEnter a word that ends with $: ");
    } while (word[count - 1] != '$');

    return 0;
}