Linux c 文件操作合并

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

int main() {
    FILE *sourceFile1, *sourceFile2, *destFile;
    char ch;

    // 打开源文件1
    sourceFile1 = fopen("file1.txt", "r");
    if (sourceFile1 == NULL) {
        perror("Error opening file1.txt");
        return EXIT_FAILURE;
    }

    // 打开源文件2
    sourceFile2 = fopen("file2.txt", "r");
    if (sourceFile2 == NULL) {
        perror("Error opening file2.txt");
        fclose(sourceFile1);
        return EXIT_FAILURE;
    }

    // 打开目标文件
    destFile = fopen("merged.txt", "w");
    if (destFile == NULL) {
        perror("Error opening merged.txt");
        fclose(sourceFile1);
        fclose(sourceFile2);
        return EXIT_FAILURE;
    }

    // 从源文件1读取内容并写入目标文件
    while ((ch = fgetc(sourceFile1)) != EOF) {
        fputc(ch, destFile);
    }

    // 从源文件2读取内容并写入目标文件
    while ((ch = fgetc(sourceFile2)) != EOF) {
        fputc(ch, destFile);
    }

    // 关闭所有文件
    fclose(sourceFile1);
    fclose(sourceFile2);
    fclose(destFile);

    printf("Files have been merged successfully.\n");
    return EXIT_SUCCESS;
}