浮点型转字符串时精度丢失
本帖最后由 new_guard 于 2017-7-7 11:23 编辑#include <iostream>
#include <fstream>
#include <string>
#include <sstream>
#include "atlstr.h"
#include <cstdio>
using namespace std;
void main()
{
float mag = {-0.14189115,0.039332587,-0.044832617,0.83130932,0.0039432552,0.028655458};
ofstream out;
string temp_t;
char buffer;
out.open("first.txt");
if(!out.is_open())
{
cerr << "打开out文件出错！\n";
return;
}
for(int i = 0; i < 6; i++)
{
sprintf_s(buffer, "%0.*f", 10, mag); //此处代码重要
temp_t = buffer;
cout << temp_t << "\t"; //见下图显示结果
out << temp_t <<" ";
temp_t = "";
}
out.close();
return;
}
原本想保留指定位数的小数，不足位数补零，但遇到奇葩问题是乱补数，我就凌乱了......................
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