abs()函式是否只能整數值呢 我有一個float的值丟進去之後出來卻是整數...???? 如果是浮點數是否要自己判斷呢 之前為了應急 寫呢這樣判斷是否有更好的方法呢 float ff=-0.7077; String cc=FloatToStr(ff); if(cc.Pos("-")==true) { cc=cc.Delete(1,1); } ff=StrToFloat(cc);

您好: 改用fabs函式看看!

補充

#include  
#include  <math.h>
#include      void main( void )
{
   int    ix = -4, iy;
   long   lx = -41567L, ly;
   double dx = -3.141593, dy;       iy = abs( ix );
   printf( "The absolute value of %d is %d\n", ix, iy);       ly = labs( lx );
   printf( "The absolute value of %ld is %ld\n", lx, ly);       dy = fabs( dx );
   printf( "The absolute value of %f is %f\n", dx, dy );
}

Output The absolute value of -4 is 4 The absolute value of -41567 is 41567 The absolute value of -3.141593 is 3.141593 ~ 勿在浮沙上面築高塔 ~

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~ 勿在浮沙上面築高塔 ~

謝謝兩位大大的解答........... 原來還有東東可用呀.....cccc