我如何在c中決議這個檔案-有解無憂

如何從其含義中拆分該詞 1.猛犸象：大

我的代碼：

void ReadFromFile(){
FILE *dictionary = fopen("dictionary.txt", "r");
char word[20];
char meaning[50];
while(fscanf(dictionary, "%[^:]:%[^\t]\t", word, meaning) == 2){
    printf("%s %s\n", word, meaning);
}
fclose(dictionary);

uj5u.com熱心網友回復：

假設word和meaning不包含數字和點，我的方法如下：

首先，將數字和點上的輸入行拆分為形式為的標記word: meaning。
接下來用冒號字符分隔每個標記。
最后，洗掉前導和尾隨的空白字符。

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define INFILE "dictionary.txt"

void split(char *str);
void separate(char *str);
char *trim(char *str);

/*
 * split line on serial number into "word" and "meaning" pairs
 * WARNING: the array of "str" is modified
 */
void
split(char *str)
{
    char *tk;                           // pointer to each token
    char delim[] = "0123456789.";       // characters used in the serial number

    tk = strtok(str, delim);            // get the first token
    while (tk != NULL) {
        separate(tk);                   // separate each token
        tk = strtok(NULL, delim);       // get the next token
    }
}

/*
 * separate the pair into "word" and "meaning" and print them
 */
void
separate(char *str)
{
    char *p;
    if (NULL == (p = index(str, ':'))) {
                                        // search a colon character in "str"
        fprintf(stderr, "Illegal format: %s\n", str);
        exit(1);
    }
    *p   = '\0';                        // terminate the "word" string
                                        // now "p" points to the start of "meaning"
    printf("%s %s\n", trim(str), trim(p));
}

/*
 * remove leading and trailing whitespaces
 * WARNING: the array of "str" is modified
 */
char *
trim(char *str)
{
    char *p;
    for (p = str; *p != '\0'; p  );     // jump to the end of "str"
    for (; p > str && (*p == ' ' || *p == '\t' || *p == '\r' || *p == '\n' || *p == '\0'); p--);
                                        // rewind the pointer skipping blanks
    *  p = '\0';                        // chop the trailing blanks off
    for (p = str; *p != '\0' && (*p == ' ' || *p == '\t' || *p == '\r' || *p == '\n'); p  );
                                        // skip leading blanks
    return p;
}

int
main()
{
    FILE *fp;
    char str[BUFSIZ];

    if (NULL == (fp = fopen(INFILE, "r"))) {
        perror(INFILE);
        exit(1);
    }

    while (NULL != fgets(str, BUFSIZ, fp)) {
        split(trim(str));
    }

    fclose(fp);
    return 0;
}

輸出：

foe enemy
vast huge
purchase buy
drowsy sleepy
absent missing
prank trick
[snip]

[替代]
我想C可能不適合這種字串操作的語言。高級語言，例如python，perl或ruby將用更少的代碼解決它。這是一個python將產生相同結果的示例：

import re

with open("dictionary.txt") as f:
    s = f.read()

for m in re.finditer(r'\d \.\s*(. ?):\s*(\S )', s):
    print(m.group(1)   " "   m.group(2))

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標籤：C 解析分裂文件处理

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