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var curVal = 0;
var memory = 0;
var lastOp = "";
var timer = 0;
function disabled(op) {
if (op == "." && CurNum.text.toString().search(/\./) != -1) {
return true;
} else if (op == "Sqrt" && CurNum.text.toString().search(/-/) != -1) {
return true;
} else {
return false;
}
}
function doOp(op) {
if (disabled(op)) {
return;
}
if (op.toString().length==1 && ((op >= "0" && op <= "9") || op==".") ) {
if (CurNum.text.toString().length >= 14)
return; // No arbitrary length numbers
if (lastOp.toString().length == 1 && ((lastOp >= "0" && lastOp <= "9") || lastOp==".") ) {
CurNum.text = CurNum.text + op.toString();
} else {
CurNum.text = op;
}
lastOp = op;
return;
}
lastOp = op;
// Pending operations
if (CurrentOperation.text == "+") {
CurNum.text = Number(CurNum.text.valueOf()) + Number(curVal.valueOf());
} else if (CurrentOperation.text == "-") {
CurNum.text = Number(curVal) - Number(CurNum.text.valueOf());
} else if (CurrentOperation.text == "x") {
CurNum.text = Number(curVal) * Number(CurNum.text.valueOf());
} else if (CurrentOperation.text == "/") {
CurNum.text = Number(Number(curVal) / Number(CurNum.text.valueOf())).toString();
} else if (CurrentOperation.text == "=") {
}
if (op == "+" || op == "-" || op == "x" || op == "/") {
CurrentOperation.text = op;
curVal = CurNum.text.valueOf();
return;
}
curVal = 0;
CurrentOperation.text = "";
// Immediate operations
if (op == "1/x") { // reciprocal
CurNum.text = (1 / CurNum.text.valueOf()).toString();
} else if (op == "^2") { // squared
CurNum.text = (CurNum.text.valueOf() * CurNum.text.valueOf()).toString();
} else if (op == "Abs") {
CurNum.text = (Math.abs(CurNum.text.valueOf())).toString();
} else if (op == "Int") {
CurNum.text = (Math.floor(CurNum.text.valueOf())).toString();
} else if (op == "+/-") { // plus/minus
CurNum.text = (CurNum.text.valueOf() * -1).toString();
} else if (op == "Sqrt") { // square root
CurNum.text = (Math.sqrt(CurNum.text.valueOf())).toString();
} else if (op == "MC") { // memory clear
memory = 0;
} else if (op == "M+") { // memory increment
memory += CurNum.text.valueOf();
} else if (op == "MR") { // memory recall
CurNum.text = memory.toString();
} else if (op == "MS") { // memory set
memory = CurNum.text.valueOf();
} else if (op == "Bksp") {
CurNum.text = CurNum.text.toString().slice(0, -1);
} else if (op == "C") {
CurNum.text = "0";
} else if (op == "AC") {
curVal = 0;
memory = 0;
lastOp = "";
CurNum.text ="0";
}
}
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