在C++中将int转换为等价字符串的最简单方法是什么?我知道两种方法。有没有更简单的方法?

(1)

int a = 10;
char *intStr = itoa(a);
string str = string(intStr);

(2)

int a = 10;
stringstream ss;
ss << a;
string str = ss.str();

当前回答

使用字符串流会更容易:

#include <sstream>

int x = 42;          // The integer
string str;          // The string
ostringstream temp;  // 'temp' as in temporary
temp << x;
str = temp.str();    // str is 'temp' as string

或生成函数:

#include <sstream>

string IntToString(int a)
{
    ostringstream temp;
    temp << a;
    return temp.str();
}

其他回答

首先包括:

#include <string>
#include <sstream>

第二步添加方法:

template <typename T>
string NumberToString(T pNumber)
{
 ostringstream oOStrStream;
 oOStrStream << pNumber;
 return oOStrStream.str();
}

使用如下方法:

NumberToString(69);

or

int x = 69;
string vStr = NumberToString(x) + " Hello word!."
int i = 255;
std::string s = std::to_string(i);

在C++中,to_string()将通过将值表示为一系列字符来创建一个整数值的字符串对象。

C++11为数字类型引入了std::to_string():

int n = 123; // Input, signed/unsigned short/int/long/long long/float/double
std::string str = std::to_string(n); // Output, std::string

Use:

#define convertToString(x) #x

int main()
{
    convertToString(42); // Returns const char* equivalent of 42
}

Use:

#include<iostream>
#include<string>

std::string intToString(int num);

int main()
{
    int integer = 4782151;

    std::string integerAsStr = intToString(integer);

    std::cout << "integer = " << integer << std::endl;
    std::cout << "integerAsStr = " << integerAsStr << std::endl;

    return 0;
}

std::string intToString(int num)
{
    std::string numAsStr;
    bool isNegative = num < 0;
    if(isNegative) num*=-1;

    do
    {
       char toInsert = (num % 10) + 48;
       numAsStr.insert(0, 1, toInsert);

       num /= 10;
    }while (num);
  
    return isNegative? numAsStr.insert(0, 1, '-') : numAsStr;
}