使用sprintf格式化负整数/双精度(Format negative integer/double using sprintf)

使用sprintf格式化负整数/双精度(Format negative integer/double using sprintf)

是否有可能只使用sprintf（c ++）格式化负整数/双精度，使得符号和值之间有空格？

from this: -1234 to this: - 1234

编辑：它将进入一个char数组。

is it possible using only sprintf (c++) to format a negative integer/double in a way that there is a space between the sign and the value?

from this: -1234 to this: - 1234

Edit: It will go in a char array.

最满意答案

我意识到这不是问题，但因为它被标记为C ++：

std::ostringstream out; out << std::internal << std::setw(6) << -1234; std::string result = out.str();

I realize that this isn't the question but since this is tagged as C++:

std::ostringstream out; out << std::internal << std::setw(6) << -1234; std::string result = out.str();