将整数转换为字符串C ++ [英] converting integer to string C++

问题描述

  int i = 5;我想要将整数转换为char数组， 
 std :: string s; 
 std :: stringstream out; 
 out<<一世; 
 s = out.str（）; 
  

但是当我尝试打印 s 它仍然打印5.我不知道它应该这样做还是我做错了什么？除此之外，我更喜欢如果我可以转换相同的int到char数组。但我会感谢任何帮助在这件事。
谢谢！
代码摘自：替代itoa（）将整数转换为字符串C ++？

解决方案

  char * charPtr = new char [s.length ）+ 1]; // s是代码片段中的字符串
 strcpy（charPtr，s.c_str（））; 
 
 // ....... 
 
 delete [] charPtr; //应该这样做，否则内存泄漏。 
  

I am trying to convert an integer to char array and I came across this piece of code

int i = 5;
std::string s;
std::stringstream out;
out << i;
s = out.str();

But when I try to print the value of s it still prints 5. I don't know if its supposed to do that or am I doing something wrong? Besides I would prefer if I could convert the same int to char array. But I would appreciate any help in the matter. Thanks! Code taken from: Alternative to itoa() for converting integer to string C++?

解决方案

Besides I would prefer if I could convert the same int to char array.

char *charPtr = new char[ s.length() + 1 ] ; // s is the string in the snippet posted
strcpy( charPtr, s.c_str() ) ;

// .......

delete[] charPtr ; // Should do this, else memory leak.

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