将char数组转换为单个int? [英] Convert char array to single int?

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本文介绍了将char数组转换为单个int?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

任何人知道如何将一个char数组转换为一个int?

  char hello [5]; 
hello =12345;

int myNumber = convert_char_to_int(hello);
Printf(我的号码是:%d,myNumber);


解决方案

有很多种方法可以将字符串转换为int

pre> int main()
{
// char hello [5];
// hello =12345; ---> This wont compile

char hello [] =12345;

Printf(我的号码是:%d,atoi(hello));

return 0;解决方案2:使用
}



< lexical_cast
(最合适且最简单)

  int x = boost :: lexical_cast< int>(12345);解决方案3:使用 C ++ Streams  

$ <$>



  std :: string hello(123); 
std :: stringstream str(hello);
int x;
str>> X;
if(!str)
{
//转换失败。
}


Anyone know how to convert a char array to a single int?

char hello[5];
hello = "12345";

int myNumber = convert_char_to_int(hello);
Printf("My number is: %d", myNumber);

解决方案

There are mulitple ways of converting a string to an int.

Solution 1: Using Legacy C functionality

int main()
{
    //char hello[5];     
    //hello = "12345";   --->This wont compile

    char hello[] = "12345";

    Printf("My number is: %d", atoi(hello)); 

    return 0;
}

Solution 2: Using lexical_cast(Most Appropriate & simplest)

int x = boost::lexical_cast<int>("12345"); 

Solution 3: Using C++ Streams

std::string hello("123"); 
std::stringstream str(hello); 
int x;  
str >> x;  
if (!str) 
{      
   // The conversion failed.      
} 

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