C++ “setprecision”不是“std”的成员
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时间：2020-08-27 16:17:14 来源:igfitidea点击:
‘setprecision’ is not a member of ‘std’
提问by Aquarius_Girl
Errors:
错误：
~> 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:~>
Code:
代码：
#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;
}
回答by juanchopanza
You need to include header <iomanip>for std::setprecisionand <limits>for std::numeric_limits. These references tell you which header to include.
您需要包括标题<iomanip>为的std :: setprecision和<limits>对的std :: numeric_limits。这些引用告诉您要包含哪个标头。
