如何在VC ++中将指数值转换为两倍? [英] How to convert exponentioal values to double in VC++?

问题描述

"3.1e-05"这是字符串，我想将此字符串转换为数字输出，结果为1.00003

"3.1e-05" this is the string and I want to convert this string into numeric output ll be 1.00003

Any suggestion will be greatly appreciated.

推荐答案

使用sscanf有什么问题?

干杯！

What''s wrong with using sscanf?

Cheers!

是字符串还是char*?假设是后者，

Is it a string or char*? Assuming the latter,

#include <stdlib.h>
const char* str = "3.1e-05";
//...
double value = atof(str);

-SA

—SA

int _tmain(int argc, _TCHAR* argv[])
{
  TCHAR*  e;
  _tprintf(__T("%.5lf"),_tcstod(1<argc?argv[1]:__T("3.1e-05"),&e));
  _gettch();
  return 0;
}

很简单，不是吗?

Thats easy, isnt?

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