Question

在我的代码中，我试图用一定长度的文字阅读。但是fscanf对我不起作用。我原本打算使用malloc动态分配内存，但为方便起见我切换到静态。我的问题是在copyWords函数中，靠近底部？我的问题是什么？

#include "stdafx.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>

char longestWords[15][100];
char exampleLetters[] = "faeugher";     //These are a group of example letters that will be randomly generated in a previous part of the program
char *fileName = "D:\\webster.txt";     //Dictionary file

//int initialiseWords();    //This was to set my pointers to NULL if I was to use malloc
int copyWords(int val);

int main()  //This function detects how many words there are of each length (maximum length is 8)
{
    int i, j, k;
    long int n[8] = {0};
    char line[10];

    FILE *fp = fopen(fileName, "r");

    //initialiseWords();

    if (fp == NULL) {
        printf("Error opening file!\n");
    }
    else
    {
        while (fgets(line, sizeof(line), fp)) {
            k = 0;

            for (i = 0; i < 8; i++) {
                for (j = k; j < 8; j++) {
                    if (line[i] == exampleLetters[j]) {
                        k++;
                        break;
                    }
                }
            }

            for (i = 1; i < 9; i++) {
                if (k == i) n[i-1]++;       //These values are incremented everytime a word of that amount of letters is found i.e. n[0]++ when a one letter word is found
            }
        }
    }

    fclose(fp);

    for (i = 7; i >= 0; i--) {
        if (n[i] != 0) {
            copyWords(i);
            break;
        }
    }

    for (i = 0; i < 8; i++) {
        printf("%li ", n[i]);   //This is irrelevant but just to display the amount of each number of words
    }

    return 1;
} 

/*int initialiseWords()
{
    int i;

    for (i = 0; i < 100; i++) {
        longestWords[i] = NULL;
    }

    return 1;
}*/

int copyWords(int val)  //This function copies of over the words that have the maximum length
{
    int i, j, k, l;
    char line[15];

    FILE *fp = fopen(fileName, "r");

    if (fp == NULL) {
        printf("Error opening file!\n");
    }
    else
    {
        l = 0;

        while (fgets(line, sizeof(line), fp)) {
            k = 0;

            for (i = 0; i < 8; i++) {
                for (j = k; j < 8; j++) {
                    if (line[i] == exampleLetters[j]) {
                        k++;
                        break;
                    }
                }
            }

            if (k == val + 1) {
                fscanf(fp, "%s", &longestWords[l]);     //MY PROBLEM!!! The data won't read in to longestWords
                l++;
            }
        }
    }

    fclose(fp);

   return 1;
}

Answer 1

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我决定将最长词改为双指针。然后我根据该类型数组中的多少个单词为此指针分配内存，例如如果有3个八个字母的单词（n [7]），我会给双指针分配三个指针，然后我指定了9个字符的指针。这允许我strcpy（）行到最长的词并打印它们。

C编程：读数据

1 个答案: