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圆双在颤动

代码示例

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镖圆 

void main() { 
   double n1 = 12.023; 
   double n2 = 12.89; 
   
   var value = n1.round(); 
   print( value ); 
   
   value = n2.round(); 
   print( value ); 
}
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扑轮双 

int doubleRoundUp = doubleToRoundUp.ceil();
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圆双在颤动 

import 'dart:math';

double roundDouble(double val, int places){
  num mod = pow(10.0, places);
  return ((val * mod).round().toDouble() / mod);
}

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圆双在颤动

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