c - 指针 - 在两个文件中读取、写入、复制 c 中的文本

Question

我有一个任务。我必须编写一个程序，从文件（source.txt）中获取文本并将它们放入数组中，然后将此数组写入另一个文件（result.txt），然后将数组复制到另一个数组并将此数组放入result.txt 然后我从键盘中取出字符并将它们放入数组和 txt 文件中。我必须在单独的文件中创建函数，并且必须在POINTERS上工作。我的程序编译没问题，但是在result.txt里面什么都没有，不知道为什么？这是我的主程序 eng.c

#include <stdio.h>
#include <stdlib.h>
#include "eng_fun.h"

int main (int argc, char *argv[])
{
    int c, i; 
    char *s, *t, *r;  
    FILE *wz, *wc;                         
    char arr[10000];
    s = arr;
    char copyArr[10000];    
    t = copyArr;
    char keyArr[10000]; 
    r = keyArr;

    if (argc != 3) {                              
    printf("Wrong arguments number\n");
    printf("I should run this way:\n");
    printf("%s source result\n",argv[0]);
    exit(1);
    }

    if( (wz= fopen(argv[1],"r")) == NULL) {
        printf("Open error %s\n", argv[1]);
        exit(1);
    }
    if( (wc= fopen(argv[2], "w")) == NULL) {
        printf("Open error %s\n", argv[2]);
        exit(2);
    }

    fprintf(wc, "Read text from file source.txt and write into result.txt:\n");

    readText(wz, s, 10000);   
    writeText(wc, s); 
    textStats(wc, s);

    fprintf(wc, "\nCopy and paste array and write into result.txt:\n\n");

    copyText(s, t, 10000);        
    writeText(wc, t);                   
    textStats(wc, t);

    fprintf(wc, "\nText from keyboard to array and then to file result.txt\n\n");
    printf("Write some sentence and press CTRL+D. All text will write to result.txt\n");
    while( (*r++ = getchar()) != EOF )

    writeText(wc, r);
    textStats(wc, r);

    int fclose(FILE *wz);
    int fclose(FILE *wc);

    return 0;
}

这是我的功能 eng_fun.c 的程序

#include <stdio.h>
#include <stdlib.h>


int _strlen (char *array)   // here I check array length
{
    int i;
    for (i = 0; array[i] != '\0'; ++i);    
    return i;   
}

int writeText(FILE *wp, char *s)
{
    int sum = 0;
    while((*s++ = fputc(*s, wp)))
    {
        sum++;
    }
    return sum;   //I must return array length in my task, so I choose sum to  count how many signs I put
}


int readText(FILE *wp, char *s, int max)
{
    int sum = 0;

    while((*s++ = fgetc(wp)) != EOF)
    {
        sum++;
    }
    return sum;  //I must return array length
}

int copyText (char *s, char *t, int max)  
{
    if (_strlen(t) > max)
    {
        printf("This array is too big.");
    }
    else
    {
        while((*s++ = *t++));
    }
    return _strlen(t);  //I must return array length in my task
}

int allSigns(char *s) // count all signs
{
    int sum = 0;
    while (*s++ != '\0')
    {
        sum++;
    }
    return sum;
}

int notWhiteSigns(char *s) //count notWhiteSigns
{
    int sum = 0;
    while (*s++ != '\0')
    {
        if ((*s != ' ') && (*s != '\n') && (*s != '\t')  && (*s != '\v'))
            sum++;
    }
    return sum;
}

int lines(char *s) // count lines
{
    int sumLines = 1;
    while (*s++ != '\0')
    {
        if (*s++ == '\n')
            sumLines++;
    }
    return sumLines;
}

int words(char *s) // here I count words
{
    int sum = 0;
    *s++;
    while (*s != '\0')
    {
        if (*s == ' ' && *(s-1) != ' ' && *s != ('\n' || '\t' || '\v') && (*(s-1) != ('\n' || '\t' || '\v')))
            sum++;
    }
    if (*s-1 != ' ');
        sum++;
    return sum;
}


int textStats(FILE *wp, char *s) // (here I write stats)   
{
    fprintf(wp, "All signs: %i\n not white signs: %i\n words: %i\n lines: %i\n\n\n\n", allSigns(s), notWhiteSigns(s), words(s), lines(s));
    return 0;
}

和 eng_fun.h 文件

#ifndef A_A
#define A_A

int _strlen (char *tab);
int writeText(FILE *wp, char *s);
int readText(FILE *wp, char *s, int max);
int copyText(char *s, char *t, int max);
int allSigns(char *s);
int notWhiteSigns(char *s);
int lines(char *s);
int words(char *s);
int textStats(FILE *wp, char *s);
#endif

我的源.txt

A computer is a machine that can be instructed to carry out sequences of arithmetic or logical operations 
automatically via computer programming. Modern computers have the ability to follow generalized sets of 
operations, called programs. These programs enable computers to perform an extremely wide range of tasks. 

并且开头的文件result.txt是空的

我以这种方式编译我的文件

gcc -c eng.c
gcc -c fun_eng.c
gcc -o eng.x eng.o fun_eng.o
./eng.x source.txt result.txt

编译没问题，但是result.txt里什么都没有

标签： carrayspointersio