C++ ‘；设置精度’；不是‘；标准&x2019；

错误：

代码：

#包括
#包括
#包括
int main（）
{
//将'lat'、'lons'和'vehicleId'转换为字符串。
浮点数LAT=2.2；
浮点数lng=2.3；
浮动车辆ID=1.0；
标准：：stringstream floatToStringLat、floatToStringLng、floatToStringVehicleId；
floatToStringLat您需要为和包含标题
。这些引用告诉您要包含哪个标题。
不包含
string.h
…您的意思是
string
还是
cstring
？对于
std:：numeric\u limits
btw，您需要
。记住，您可以找到通过在C++引用中查看它们：
~> g++ ssstring.cpp
ssstring.cpp: In function ‘int main()’:
ssstring.cpp:12:31: error: ‘setprecision’ is not a member of ‘std’
ssstring.cpp:12:52: error: ‘numeric_limits’ is not a member of ‘std’
ssstring.cpp:12:74: error: expected primary-expression before ‘float’
ssstring.cpp:13:30: error: ‘setprecision’ is not a member of ‘std’
ssstring.cpp:13:51: error: ‘numeric_limits’ is not a member of ‘std’
ssstring.cpp:13:73: error: expected primary-expression before ‘float’
ssstring.cpp:14:28: error: ‘setprecision’ is not a member of ‘std’
ssstring.cpp:14:49: error: ‘numeric_limits’ is not a member of ‘std’
ssstring.cpp:14:71: error: expected primary-expression before ‘float’
anisha@linux-trra:~>

#include <sstream>
#include <iostream>
#include <string.h>

int main ()
{
    // Convert `lat`, `lons`, and `vehicleId` to string.
    float selectedPointLat = 2.2;
    float selectedPointLng = 2.3;
    float vehicleId        = 1.0;

    std :: stringstream floatToStringLat, floatToStringLng, floatToStringVehicleId;

    floatToStringLat       << std :: setprecision (std :: numeric_limits<float> :: digits10 + 1); floatToStringLat  << selectedPointLat;
    floatToStringLng       << std :: setprecision (std :: numeric_limits<float> :: digits10 + 1); floatToStringLng << selectedPointLng;
    floatToStringVehicleId << std :: setprecision (std :: numeric_limits<float> :: digits10 + 1); floatToStringVehicleId << vehicleId;

}