Question

我是C的新手，今天我得到了一项任务，要求我从文件中读取文本，计算行数，字符数和单词数，然后以特定格式返回。

为了清楚 - 我需要阅读这个文本文件：

"I must not fear.
Fear is the mind-killer.
Fear is the little-death that brings total obliteration.
I will face my fear.
I will permit it to pass over me and through me.
And when it has gone past I will turn the inner eye to see its path.
Where the fear has gone there will be nothing... only I will remain"
  Litany Against Fear, Dune by Frank Herbert

并输出如下：

1)"I must not fear.[4,17]
2)Fear is the mind-killer.[4,24]
3)Fear is the little-death that brings total obliteration.[8,56]
4)I will face my fear.[5,20]
5)I will permit it to pass over me and through me.[11,48]
6)And when it has gone past I will turn the inner eye to see its path.[16,68]
7)Where the fear has gone there will be nothing... only I will remain"[13,68]
8)      Litany Against Fear, Dune by Frank Herbert[7,48]

现在，我写了一些接受文件的内容，它正确地计算了行数，但我有两个主要问题 - 1.如何从文件中获取文本以显示在输出中？我根本无法做到这一点。我的字数根本不起作用，我的字符数也没有。你能帮忙吗？

#include <stdio.h>

#define IN 1
#define OUT 0

void main()
{
    int numChars = 0;
    int numWords = 0;
    int numLines = 0;
    int state = 0;
    int test = 0;

    FILE *doesthiswork;

    doesthiswork = fopen("testWords.in", "r");
    state = OUT;

    while ((test = fgetc(doesthiswork)) != EOF) 
    {
        ++numChars;
        if ( test == '\n') 
        {
            ++numLines;
            if (test == ' ' || test == '\t' || test == '\n')
            {      
                state = OUT;
            } 
            else if (state == OUT)
            {
                state = IN;
                ++numWords;
            }

         }
         printf("%d) I NEED TEXT HERE. [%d %d]\n",numLines, numWords, numChars);
     }

}

Answer 1

如果您使用 getline（）函数从文件中读取每一行，会更好。
使用 strtok（）函数读取行处理后。通过这个，您将获得该行中的单词数并将其保存在变量中。
然后处理每个变量并获得字符数。
输出行号，单词数和字符数。

然后读另一行等等。

Answer 2

如何让文件中的文字显示在输出中？
它应该通过准备缓冲区存储在那里。
我的字数根本不起作用，我的字符数也是关闭的。
测试错误的顺序。

像这样解决：

#include <stdio.h>

#define IN  1
#define OUT 0

int main(){
    int numChars = 0;
    int numWords = 0;
    int numLines = 0;
    int state = OUT;
    int test;
    char buffer[1024];
    int buff_pos = 0;
    FILE *doesthiswork;

    doesthiswork = fopen("data.txt", "r");
    state = OUT;

    while((test = fgetc(doesthiswork)) != EOF) {
        ++numChars;
        buffer[buff_pos++] = test;
        if(test == ' ' || test == '\t' || test == '\n'){
            state = OUT;
            if(test == '\n') {
                ++numLines;
                --numChars;//no count newline
                buffer[--buff_pos] = '\0';//rewrite newline
                printf("%d)%s[%d,%d]\n", numLines, buffer, numWords, numChars);
                buff_pos = 0;
                numWords = numChars = 0;
            }
         } else {
            if(state == OUT){
                state = IN;
                ++numWords;
            }
         }
    }
    fclose(doesthiswork);
    if(buff_pos != 0){//Input remains in the buffer.
        ++numLines;
        buffer[buff_pos] = '\0';
        printf("%d)%s[%d,%d]\n", numLines, buffer, numWords, numChars);
    }
    return 0;
}

计算C中的行，数字和字符

2 个答案: