c - 程序不断打印零字节？

Question

我正在尝试创建一个程序来删除句子中的元音。但是，我的程序不断失败，因为它不断在字符串中打印零字节。有人能告诉我哪里出错了吗？

#include <stdio.h>

int remove_all_vowels(int character);

int main(void) {

int character = getchar();
while (character != EOF && character != '\0') {

int new_character = remove_all_vowels(character);
putchar(new_character);

character = getchar();
}


return 0;

}

int remove_all_vowels(int character) {
if (character == 'a' || character == 'e' || character == 'i' || character 
== 'o' || character == 'u') {
return 0;
} else {
return character;
}

}

Answer 1

您的问题(输出空字符)来自于您无条件 putchar(3) remove_all_vowels 的结果，当给定字符是元音时，它返回 0(空字符)。

用空格替换元音:

您只需将remove_all_vowels中的return 0;更改为return ' ';

要完全删除元音:

我建议使用一个函数来帮助您检查元音，而不是让它像对 char 进行转换一样，这确实是 pythonest。

代码示例:

int is_vowel(int character) {
    return (
           character == 'a' || character == 'e' || character == 'i'
        || character == 'o' || character == 'u'
    );
}

// Then, in your main...
...
if (!is_vowel(character))
    putchar(character);