我如何将浮点值分配给 char* c[] 数组
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how can i assign float value to char* c[] array
提问by poppy
I have string,int,float values and trying to assign those values to char* c[] array like this.
我有 string、int、float 值并尝试将这些值分配给 char* c[] 数组，如下所示。
char *str = "helloo";
int int = 1000;
short st1[]={32760};
float flt = 2.345;
char* c [] = {(char*)int1,(char*)str,(char*)flt,(char*)st1};
but for float getting illegal explicit conversion from 'float' to 'char * 'anybody tel me how to assign?
但是对于 float从“float”到“char *”的非法显式转换，有人告诉我如何分配吗？
回答by Kerrek SB
In C++:
在 C++ 中：
#include <string>
std::string arr[] = { std::to_string(1000),
"helloo",
std::to_string(2.345f),
std::to_string(32760) };
You can use arr[0].c_str()etc. to get back char const *s.
您可以使用arr[0].c_str()etc. 来取回char const *s。
回答by paxdiablo
You can't just castthose types and expect to get useful results. Casting is a minimal operation which can work to transform data in certain predefined ways, but it won't (for example) intelligently turn integers into their string representations.
您不能只是强制转换这些类型并期望获得有用的结果。转换是一种最小的操作，它可以以某些预定义的方式转换数据，但它不会（例如）智能地将整数转换为它们的字符串表示形式。
That's why your compiler is complaining.
这就是你的编译器抱怨的原因。
If you want the string representation of numeric data, you have to convert them differently, with something like:
如果您想要数字数据的字符串表示形式，则必须以不同的方式转换它们，例如：
char intStr[30]
sprintf (intStr, "%d", int1);
If you're looking to get string representations of them all, you can do something like:
如果您想获得它们的所有字符串表示，您可以执行以下操作：
char *str = "helloo";
int int1 = 1000;
short st1[]={32760};
float flt = 2.345;
char mybuff1[50], mybuff2[50], mybuff3[50], mybuff4[50];
sprintf (mybuff1, "%d", int1);
sprintf (mybuff2, "%s", str);
sprintf (mybuff3, "%f", flt);
sprintf (mybuff4, "%d", st1[0]);
char *c [] = {mybuff1, mybuff2, mybuff3, mybuff4);
And be aware that, although C and C++ have very similar idioms, and are mostly compatible if you stick to a subset, they are notthe same language and the best way to do something changes dramatically depending on the actual language you're using.
并且请注意，尽管 C 和 C++ 具有非常相似的习语，并且如果您坚持使用一个子集，它们大多是兼容的，但它们不是同一种语言，并且根据您使用的实际语言，执行某事的最佳方法会发生巨大变化。
For example, it's rarely necessary to use C-style strings in C++ since that language provides an impressive real string type. Ditto for malloc/freeas opposed to new/deleteand many other aspects.
例如，很少需要在 C++ 中使用 C 风格的字符串，因为该语言提供了令人印象深刻的真实字符串类型。同上，malloc/free而不是new/delete许多其他方面。
Questions should generally be tagged C or C++, rarely both.
问题通常应该标记为 C 或 C++，很少同时标记。
