C++代码报错：int转std::__cxx11::string请求失败，求问题排查

我是编程新手，长期潜水首次发帖。正在为学校项目基于已有代码构建程序，但出现大量错误，尤其是string使用、strcpy调用和const构造函数相关问题。

报错信息：

error: conversion from 'int' to non-scalar type 'std::__cxx11::string {aka std::__cxx11::basic_string<char>}' requested

出错的代码 #

CPP文件 #

#include "taxi.h"
#include <iostream>
#include <stdint.h>
#include <string>
#include <cstring>
using namespace std;

Taxi::Taxi(){
    int interno = 0;
    string marca = 'Marca';
    string patente = 'AA 00 AA';
    string Propietario = 'Apellido, Nombre';
    int chofer = 0;
    fadia = 1;
    fames = 1;
    fanio = 1970;
    fbdia = 1;
    fbmes = 1;
    fbanio = 1970;
    double tel = 0;
}

Taxi::Taxi(int inter, string marc, string pat, string prop, int ch, int dia_a,
    int dia_b, int mes_a, int mes_b, int anio_a, int anio_b, double te){
        
    int interno = inter;
    string marca = marc;
    string patente = pat;
    string propietario = prop;
    int chofer = ch;
    fadia = dia_a;
    fames = mes_a;
    fanio = anio_a;
    fbdia = dia_b;
    fbmes = mes_b;
    fbanio = anio_b;
    double tel = te;
}

Taxi::~Taxi(){
    cout<<"Destructor Activado. Fin del Programa."<<endl;
}

void Taxi::setPropietario(string prop){
    strcpy(propietario, prop);
}

void Taxi::setChofer(int ch){
    int chofer = ch;
}

void Taxi::imprimir(){
    cout<<"Chofer en Servicio: "<<"\n   -"<<chofer<<"\n  -"<<propietario <<"\n  -"<<tel<<endl;
    cout<<"Vehiculo en Servicio: "<<"\n   -"<<marca<<"\n  -"<<patente<<endl;
    cout<<"Fecha de alta: "<<fadia<<"/"<<fames<<"/"<<fanio<<endl;
    cout<<"Fecha de baja: "<<fbdia<<"/"<<fbmes<<"/"<<fbanio<<endl;
}

头文件（taxi.h） #

#ifndef TAXI_H
#define TAXI_H
#endif // TAXI_H
#include <iostream>
#include <stdint.h>
#include <string>
#include <cstring>
    
class Taxi{
    private:
        int interno;
        std::string marca;
        std::string patente;
        std::string propietario;
        int chofer;
        int fadia;
        int fames;
        int fanio;
        int fbdia;
        int fbmes;
        int fbanio;
        double tel;

    public:
        Taxi();
        Taxi(int inter, std::string marc, std::string pat, std::string prop, int ch, int dia_a,
            int dia_b, int mes_a, int mes_b, int anio_a, int anio_b, double te);
        Taxi(const Taxi &);
        ~Taxi();

        void setPropietario(std::string prop);
        void setChofer(int inter);
        void imprimir();
        void imprimirtaxi();
};

错误修复步骤 #

• 字符串初始化错误：构造函数中用单引号'包裹字符串（如'Marca'），单引号仅适用于单个字符，多个字符会被编译器解析为整数，触发int转std::string的报错。改为双引号"Marca"即可。同时注意：构造函数中是给类成员变量赋值，不要重新声明局部变量（比如int interno = 0;要改成interno = 0;，否则成员变量不会被赋值）。

• 构造函数局部变量遮蔽成员变量：两个构造函数都重新定义了与成员变量同名的局部变量（如int interno = inter;），导致成员变量未被正确初始化。去掉类型声明，直接给成员变量赋值：

  Taxi::Taxi(){
      interno = 0;
      marca = "Marca";
      patente = "AA 00 AA";
      propietario = "Apellido, Nombre";
      chofer = 0;
      fadia = 1;
      fames = 1;
      fanio = 1970;
      fbdia = 1;
      fbmes = 1;
      fbanio = 1970;
      tel = 0;
  }
  

  带参数的构造函数同理，修改后：

  Taxi::Taxi(int inter, string marc, string pat, string prop, int ch, int dia_a,
      int dia_b, int mes_a, int mes_b, int anio_a, int anio_b, double te){
          
      interno = inter;
      marca = marc;
      patente = pat;
      propietario = prop;
      chofer = ch;
      fadia = dia_a;
      fames = mes_a;
      fanio = anio_a;
      fbdia = dia_b;
      fbmes = mes_b;
      fbanio = anio_b;
      tel = te;
  }
  

• strcpy使用错误：strcpy是C语言中用于复制C风格字符串（char*）的函数，不能直接用于std::string。std::string直接用赋值运算符=即可修改值，修改setPropietario函数：

  void Taxi::setPropietario(string prop){
      propietario = prop;
  }
  

• setChofer函数错误：同样存在局部变量遮蔽成员变量的问题，改为直接赋值：

  void Taxi::setChofer(int ch){
      chofer = ch;
  }
  

• 头文件预处理指令位置错误：#endif // TAXI_H放在了头文件开头，导致后续类定义和头文件包含被排除，编译时找不到Taxi类定义。将#endif移到文件末尾：

  #ifndef TAXI_H
  #define TAXI_H
  #include <iostream>
  #include <stdint.h>
  #include <string>
  #include <cstring>
      
  class Taxi{
      // ... 类定义 ...
  };
  #endif // TAXI_H
  

• 未实现拷贝构造函数：头文件声明了Taxi(const Taxi &);但未实现，可添加实现（成员均为基本类型和std::string，默认拷贝逻辑足够），或删除该声明。实现示例：

  Taxi::Taxi(const Taxi &other){
      interno = other.interno;
      marca = other.marca;
      patente = other.patente;
      propietario = other.propietario;
      chofer = other.chofer;
      fadia = other.fadia;
      fames = other.fames;
      fanio = other.fanio;
      fbdia = other.fbdia;
      fbmes = other.fbmes;
      fbanio = other.fbanio;
      tel = other.tel;
  }
  

内容的提问来源于stack exchange，提问作者Facundo zanatta