控制小数点代码,CSharp代码库,德仔网

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【CSharp】控制小数点
作者: / 发布于2011/1/14/ 400
<div><span style="color: #0000ff">import</span><span style="color: #000000"> java.text.DecimalFormat;

</span><span style="color: #0000ff">public</span><span style="color: #000000"> </span><span style="color: #0000ff">class</span><span style="color: #000000"> NumberUtil {
 
 </span><span style="color: #0000ff">public</span><span style="color: #000000"> </span><span style="color: #0000ff">static</span><span style="color: #000000"> </span><span style="color: #0000ff">double</span><span style="color: #000000"> decimalFormatD(</span><span style="color: #0000ff">int</span><span style="color: #000000"> num, </span><span style="color: #0000ff">double</span><span style="color: #000000"> d){
 String format </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #000000">"</span><span style="color: #000000">0.</span><span style="color: #000000">"</span><span style="color: #000000">;
 String result </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #000000">""</span><span style="color: #000000">;
 </span><span style="color: #0000ff">double</span><span style="color: #000000"> db;
 
 </span><span style="color: #0000ff">for</span><span style="color: #000000">(</span><span style="color: #0000ff">int</span><span style="color: #000000"> i</span><span style="color: #000000">=</span><span style="color: #000000">0</span><span style="color: #000000">;i</span><span style="color: #000000"><</span><span style="color: #000000">num;i</span><span style="color: #000000">++</span><span style="color: #000000">)
 format </span><span style="color: #000000">=</span><span style="color: #000000"> format.concat(</span><span style="color: #000000">"</span><span style="color: #000000">0</span><span style="color: #000000">"</span><span style="color: #000000">);
 
 DecimalFormat decimal </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #0000ff">new</span><span style="color: #000000"> DecimalFormat(format);
 result </span><span style="color: #000000">=</span><span style="color: #000000"> decimal.format(d);
 db </span><span style="color: #000000">=</span><span style="color: #000000"> Double.parseDouble(result);
 
 </span><span style="color: #0000ff">return</span><span style="color: #000000"> db;
 }
 
 </span><span style="color: #0000ff">public</span><span style="color: #000000"> </span><span style="color: #0000ff">static</span><span style="color: #000000"> </span><span style="color: #0000ff">float</span><span style="color: #000000"> decimalFormatF(</span><span style="color: #0000ff">int</span><span style="color: #000000"> num, </span><span style="color: #0000ff">float</span><span style="color: #000000"> f){
 String format </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #000000">"</span><span style="color: #000000">0.</span><span style="color: #000000">"</span><span style="color: #000000">;
 String result </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #000000">""</span><span style="color: #000000">;
 </span><span style="color: #0000ff">float</span><span style="color: #000000"> fl;
 
 </span><span style="color: #0000ff">for</span><span style="color: #000000">(</span><span style="color: #0000ff">int</span><span style="color: #000000"> i</span><span style="color: #000000">=</span><span style="color: #000000">0</span><span style="color: #000000">;i</span><span style="color: #000000"><</span><span style="color: #000000">num;i</span><span style="color: #000000">++</span><span style="color: #000000">)
 format </span><span style="color: #000000">=</span><span style="color: #000000"> format.concat(</span><span style="color: #000000">"</span><span style="color: #000000">0</span><span style="color: #000000">"</span><span style="color: #000000">);
 
 DecimalFormat decimal </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #0000ff">new</span><span style="color: #000000"> DecimalFormat(format);
 result </span><span style="color: #000000">=</span><span style="color: #000000"> decimal.format(f);
 fl </span><span style="color: #000000">=</span><span style="color: #000000"> Float.parseFloat(result);
 
 </span><span style="color: #0000ff">return</span><span style="color: #000000"> fl;
 }

 
 </span><span style="color: #0000ff">public</span><span style="color: #000000"> </span><span style="color: #0000ff">static</span><span style="color: #000000"> String doubleToString(</span><span style="color: #0000ff">double</span><span style="color: #000000"> f){ 
 String s </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #000000">""</span><span style="color: #000000">;
 </span><span style="color: #0000ff">double</span><span style="color: #000000"> a </span><span style="color: #000000">=</span><span style="color: #000000"> </span><span style="color: #000000">0</span><span style="color: #000000">;
 
 </span><span style="color: #0000ff">while</span><span style="color: #000000">(f </span><span style="color: #000000">>=</span><span style="color: #000000"> </span><span style="color: #000000">1</span><span style="color: #000000">) {
 
 a </span><span style="color: #000000">=</span><span style="color: #000000"> f</span><span style="color: #000000">%</span><span style="color: #000000">((</span><span style="color: #0000ff">double</span><span style="color: #000000">)</span><span style="color: #000000">10</span><span style="color: #000000">);
 
 s </span><span style="color: #000000">=</span><span style="color: #000000"> String.valueOf((</span><span style="color: #0000ff">int</span><span style="color: #000000">)a) </span><span style="color: #000000">+</span><span style="color: #000000"> s;
 f</span><span style="color: #000000">=</span><span style="color: #000000">(f </span><span style="color: #000000">-</span><span style="color: #000000"> a)</span><span style="color: #000000">/</span><span style="color: #000000">10</span><span style="color: #000000">;
 }
 </span><span style="color: #0000ff">return</span><span style="color: #000000"> s;
 }
}

</span></div>
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