📄 calc.html
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<html><body bgcolor=ffffff text=000000><center><table border=2><tr><td align=center valign=center bgcolor=999966><applet code="Calculator.class" width=150 height=160></applet></td></tr></table><table bgcolor=dddddd><tr><td><xmp> SimpleCalc ----------This is a simple Java Calculator with advanced functions :-DYou can use the mouse or the keyboard and then press the [=] button or press enter to evaluate.For the more advanced functions you'll have use the keyboard.The calculator supports these operators and functions:------------------------------------------------------ + addition - subtraction * multiplication / division ^ power to % modulo sin() sinus cos() cosinus tan() tangent atan() arcustangent asin() arcussinus acos() arcuscosinus sinh() hyperbolicsinus cosh() hyperboliccosinus tanh() hyperbolictangens exp() constant E raised to ln() natural logarithm [n]log() any logaritm, base n sqrt() squareroot cotan() cotangens acotan() inverted cotangens abs() absolute value of ceil() ceil, ceil(2.3) = 3 floor() floor, floor(1.23) = 1 fac() faculty, fac(n) = n*(n-1)*(n-2)*..*1 sfac() semifaculty, sfac(n) = n*(n-2)*(n-4)*..4*2 if n even, sfac(n) = n*(n-2)*(n-4)*..3*1 if n is noteven round() round fpart() decimal part ofLogical operators :------------------- == equal, returns 1.0 if arguments are equal, 0.0 otherwise != not equal, returns 1.0 if arguments is not equal, 0.0 otherwise ! not, returns 0.0 if it's argument is 1.0, 1.0 otherwise && and, returns 1.0 if argumnets both evaluates to 1.0, 0.0 otherwise || or, returns 1.0 if any argument evaluates to 1.0, 0.0 otherwise > larger than, returns 1.0 if left side is larger than the right side < less than, returns 1.0 if left side is less than the right side <= less than or equal, returns 1.0 if left side is less than or equal the right side >= larger than or equal, returns 1.0 if left side is larger than or equal the right sideSpecial functions :-------------------diff( ) will symbolically differentiate a mathematical expression of one variable. Ex. diff( x^2-2*x ) will return 2*x-2 To evaluate a differentiated expression first use set( ) to store values in the variable currently used and then differentiate and then press enter again to evaluate. Ex. set(x=2) [enter] returns "Value set" as confirmation diff(x^2) [enter] returns 2*x [enter] evaluates 2*x and returns 4set( ) will set a variable so it can be used in a calculation. Ex. set(x=5) x will be set to 5 so the calculation x^3 will evaluate to 125. You can also store a calculation directly like : set(x=3*(5-2)/7) x will be set to 3*(5-2)/7clear( ) Clears a stored variable. Ex. clear(x) will clear the variable x, any calculation with x in it after calling clear(x) will generate the error: "No value associated with x"memory Will show all values currently in memory. values will still be in memory after pressing the [clear] button, use clear( ) to clear a value in memory.Please note that diff( ) , set( ), memory and clear( ) cannot be used as a part ofan expression, this will not generate an error but will justcause the first occurance of any of the commands to be evaluated.for example: 2*5-diff(x^3) will just cause diff(x^3) to be evaluated.Constants supported:--------------------Pi pi, 3.1415...Euler base for the natural logarithm, 2.7182..true 1.0false 0.0Operator precedence in order of evaluation:-------------------------------------------( you can always change the order of evaluation by using paranthesis. )!cos sin tan sqrt exp.....etc^* / %log+ -> >= < <=== !=||&&</xmp></td></tr></table>Applet Calculator Made by Patrik Lundin,<br><a href="mailto:patrik.lundin@ebox.tninet.se">patrik.lundin@ebox.tninet.se</a><br><a href="http://user.tninet.se/~jml288p">http://user.tninet.se/~jml288p</a></center></body></html>⌨️ 快捷键说明
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