int.TryParse,Convert.ToInt32,(int)

這幾種類型在將浮點類型轉(zhuǎn)換整數(shù)時是有差別 Convert.ToInt32則會進(jìn)行四舍五入 int.TryParse只能轉(zhuǎn)換整數(shù),即浮點類型全部會返回0 (int)不會進(jìn)行四舍五入,只取整數(shù)部分,小數(shù)點部分完全舍棄
using??System;
public???class??DoubleToInt
{
?????public???static???void??Main()
????{
????????Test_DoubleToInt( 0.4 );
?????????Test_DoubleToInt( 0.5 );
????????Console.ReadKey();
????}
?????static???void??Test_DoubleToInt( double??_testNumber)
????{
?????????int??_i= 0 ;
?????????for ( int??i= 0 ;i< 10 ;i++)
????????{
?????????????if (i!= 0 ){
????????????????_testNumber+= 1 ;
????????????}
????????????Console.WriteLine( string .Format( "(int){0}={1}" ,_testNumber,( int )(_testNumber)));
????????????
????????????Console.WriteLine( string .Format( "Convent.ToInt32({0})={1}" ,_testNumber,Convert.ToInt32(_testNumber)));
?????????????//int.TryParse只有轉(zhuǎn)換整數(shù)類型，其他返回為0
?????????????int .TryParse(_testNumber.ToString(),??out??_i);
????????????Console.WriteLine( string .Format( "int.TryParse({0})={1}" ,_testNumber,_i));
????????}
????????Console.WriteLine( string .Empty);
????} }

?

?

http://www.cnblogs.com/Dely/p/3791951.html

http://stackoverflow.com/questions/11431793/convert-toint32-rounds-to-the-nearest-even-number

http://stackoverflow.com/questions/311696/why-does-net-use-bankers-rounding-as-defaul

轉(zhuǎn)載于:https://www.cnblogs.com/huangtailang/p/3919026.html

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