比较 C 中的两个文本文件 [关闭]

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改进这个问题

我想编写一个比较两个文本文件的程序，当 text1 中的一行与 text2 中的一行相同时，程序输出第一个文件中的行号，然后输出第一个文件中的行号第二个文件，然后是该行的实际文本。

我有两个输入文件。

文件1.txt

AAA
BBB
CCC

文件2.txt

DDD
CCC
FFF

output 必须是：

Line number from text1: 3, Line number from text2: 2, Text from lines: CCC

到目前为止我所拥有的：

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

void compareFiles(FILE *fp1, FILE *fp2, FILE *fp3)
{
    // Read chars
    char ch1 = getc(fp1);
    char ch2 = getc(fp2);

    // Current line in both files
    int line = 1;
    //int linen1 = 1;
    //int linen2 = 1;

    // Store lines
    char line1[1024];
    char line2[1024];

    // Line 1 from file 1 is not read; l1 from file 2 is not read
    bool readL1 = false;
    bool readL2 = false;

    // iterate loop till end of file
    while (ch1 != EOF && ch2 != EOF)
    {
        //Add chars to line string
        strncat(line1, &ch1, sizeof(line1));
        strncat(line2, &ch2, sizeof(line2));

        //Check if it's the end of line 1
        if (ch1 == '\n')
        {
            readL1 = true;
        }

        // Check if it's the end of line 2
        if (ch2 == '\n')
        {
            readL2 = true;
        }
        
        // If both lines are fully read compare them
        if (readL1 && readL2)
        {
            //If the strings are different print them
            if (strcmp(line1, line2) != 0)
            {
                fprintf(fp3, "Line: %d\t", line);

                fprintf(fp3, "L1: %s\t", line1);

                fprintf(fp3, "L2: %s\t", line2);

                strcpy(line1, "");
                strcpy(line2, "");
            }

            //Mark lines as not read
            readL1 = false;
            readL2 = false;

            line++;
        }

        //If end of line is not reached get the next char
        if (!readL1)
        {
            ch1 = getc(fp1);
        }

        if (!readL2)
        {
            ch2 = getc(fp2);
        }
    }
}

int main()
{
    //Open files
    FILE *fp1 = fopen("file1.txt", "r");
    FILE *fp2 = fopen("file2.txt", "r");
    FILE *fp3 = fopen("file3.txt", "w");

    if (fp1 == NULL || fp2 == NULL)
    {
        printf("Error : Files not open");
        exit(0);
    }

    compareFiles(fp1, fp2, fp3);

    //Close files
    fclose(fp1);
    fclose(fp2);
    fclose(fp3);
    return 0;
}

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