DELPHI常用函数集及简要范例.rar

_HELP函数集 ●●●●●●● ------------------------------------------------------------------ abs(x)绝对值 arctan(x)反正切 cos(x)传回馀弦函数值 exp(x)e的x次幂 frac(x)取小数部分 int(x)取整 ln(x)自然对数 sin(x)传回正弦函数值 sqr(x)x*x sqrt(x)平方根 其它 pred(x)pred('D')='C',pred(true)=1; succ(x)succ('Y')='Z',succ(pred(x