title: i find expression syntax error if i use fsin in program to find sin for the value
body: <p>if i use fsin to find the sin value of real number. im find and expression syntax error. i#m using turbo c++ 3.0 on dos.</p>
  
  <p>i have looked for the instruction listing in x87 fpu. i tried to google some information. and also changed my intruction set reference on compiler setting from 8087 to 80287. </p>
  
  <pre><code> #include&lt;stdio.h&gt;
      #include&lt;math.h&gt;
  
  void main(){
      double a = 1.98,val;
      asm{
      fld a
      fsin
      fstp val
      }
      printf("%f", val);
  }
  </code></pre>
  
  <p>expression sntax error: fsin</p>