控制台输出中缺少第一个字符的C++ fread字符串

#include <iostream>
#include <cstdio>
#include <cstring>

int main() {
    FILE* file = fopen("example.txt", "r");
    if (file == nullptr) {
        std::cout << "Failed to open file." << std::endl;
        return 1;
    }

    // 获取字符串的长度
    fseek(file, 0, SEEK_END);
    long fileSize = ftell(file);
    fseek(file, 0, SEEK_SET);

    // 创建缓冲区
    char* buffer = new char[fileSize + 1];

    // 读取字符串
    size_t bytesRead = fread(buffer, sizeof(char), fileSize, file);

    // 添加结束标志
    buffer[bytesRead] = '\0';

    // 输出字符串
    std::cout << "String: " << buffer << std::endl;

    // 释放缓冲区
    delete[] buffer;

    // 关闭文件
    fclose(file);

    return 0;
}