-5

我想用 C 语言编写一个程序来读取一行字符,然后在单独的行上打印该行中的每个单词。

这就是我所拥有的:

char C;

printf("Write some characters: ");
scanf_s("%c",&C);
printf("%c",C);

正如你所看到的,我还没有开始我想做的事情,因为我不知道我应该使用 if 语句还是 for 语句。

4

3 回答 3

2

首先,您需要读取整行字符,而您只读取一个字符:

#include <stdio.h>
#include <string.h>


int main()
{
    int k;
    char line[1024];
    char *p = line; // p points to the beginning of the line

    // Read the line!
    if (fgets(line, sizeof(line), stdin)) {
      // We have a line here, now we will iterate, and we
      // will print word by word:
        while(1){
            char word[256] = {0};
            int i = 0;
            // we are always using new word buffer,
            // but we don't reset p pointer!

            // We will copy character by character from line
            // until we get to the space character (or end of the line,
            // or end of the string).
            while(*p != ' ' && *p != '\0' &&  *p != '\n')
            {
              // check if the word is larger than our word buffer - don't allow
              // overflows! -1 is because we start indexing from 0, and we need
              // last element to place '\0' character! 
              if(i == sizeof(word) - 1)
                 break;

              word[i++] = *p;
              p++;
            }
            // Close the string
            word[i] = '\0';

            // Check for the end of the original string
            if(*p == '\0')
                break;

            // Move p to the next word
            p++;

            // Print it out:
            printf("%s\n", word);
        }
    }

    return 0;
}

如果您在一行中有多个空格,我会让您尝试解决问题 - 一旦您了解这是如何完成的,这并不难。

于 2013-09-08T17:02:51.277 回答
0

读取数组中的字符,创建一个 for 循环,用 endl 语句打印它们,然后跑到最近的书店拿一本编程书。

于 2013-09-08T18:00:37.543 回答
0

我懂了。现在我在这里完成了自己的解决方案,我认为它更容易理解:

#include <stdio.h>

void main()
{
char c;

c = getchar();
while(c !='\n')
{
    if (c == ' ')
    {
        printf("\n");
    }
    else
    {
        putchar(c);
    }
    c = getchar();
}
printf("\n");
}
于 2013-09-08T17:57:57.787 回答