如何在C++中連接字符串和整數？

我試圖連接字符串和整數如下：如何在C++中連接字符串和整數？

#include "Truck.h" 
#include <string> 
#include <iostream> 

using namespace std; 

Truck::Truck (string n, string m, int y) 
{ 
    name = n; 
    model = m; 
    year = y; 
    miles = 0; 
} 

string Truck :: toString() 
{ 

    string truckString = "Manufacturer's Name: " + name + ", Model Name: " + model + ", Model Year: " + year ", Miles: " + miles; 
    return truckString; 
}

我收到此錯誤：

error: invalid operands to binary expression ('basic_string<char, std::char_traits<char>, std::allocator<char> >' 
     and 'int') 
     string truckString = "Manufacturer's Name: " + name + ", Model Name: " + model + ", Model Year: " + year ", Miles...

任何想法我可能是做錯了？我是C++新手。

來源

2013-10-03 user1471980

使用'std :: to_string'或一個sting流。 – chris

@chris，我試着得到這個錯誤：錯誤：名字空間'std'中沒有名爲'to_string'的成員 – user1471980

我今天早些時候遇到這個問題，發現取決於你的編譯器設置，你可能沒有訪問到'to_string'出於某種原因。查看stringstreams以便從'int'轉換爲'string'：http://www.cplusplus.com/articles/D9j2Nwbp/ – TopGunCoder

在C++ 03，其他人都提到，您可以使用ostringstream類型，在<sstream>定義：

std::ostringstream stream; 
stream << "Mixed data, like this int: " << 137; 
std::string result = stream.str();

在C + +11，您可以使用std::to_string函數，該函數在<string>中便於聲明：

std::string result = "Adding things is this much fun: " + std::to_string(137);

希望這會有所幫助！

來源

2013-10-03 01:07:46 templatetypedef

std::stringstream s; 
s << "Manufacturer's Name: " << name 
    << ", Model Name: " << model 
    << ", Model Year: " << year 
    << ", Miles: " << miles; 

s.str();

來源

2013-10-03 00:38:54 Hei

請確保您的代碼具有四個空格縮進，或按CTRL + K自動縮進。否則，它將被解釋爲純文本。請參閱[格式化幫助]（http://stackoverflow.com/help/formatting） – dyp

使用std::ostringstream：

std::string name, model; 
int year, miles; 
... 
std::ostringstream os; 
os << "Manufacturer's Name: " << name << 
     ", Model Name: " << model << 
     ", Model Year: " << year << 
     ", Miles: " << miles; 
std::cout << os.str();    // <-- .str() to obtain a std::string object

來源

2013-10-03 00:41:22 LihO

如何在C++中連接字符串和整數？

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