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var curVal = 0
var memory = 0
var lastOp = ""
var timer = 0
function disabled(op) {
if (op == "." && display.text.toString().search(/\./) != -1) {
return true
} else if (op == squareRoot && display.text.toString().search(/-/) != -1) {
return true
} else {
return false
}
}
function doOperation(op) {
if (disabled(op)) {
return
}
if (op.toString().length==1 && ((op >= "0" && op <= "9") || op==".") ) {
if (display.text.toString().length >= 14)
return; // No arbitrary length numbers
if (lastOp.toString().length == 1 && ((lastOp >= "0" && lastOp <= "9") || lastOp == ".") ) {
display.text = display.text + op.toString()
} else {
display.text = op
}
lastOp = op
return
}
lastOp = op
if (display.currentOperation.text == "+") {
display.text = Number(display.text.valueOf()) + Number(curVal.valueOf())
} else if (display.currentOperation.text == "-") {
display.text = Number(curVal) - Number(display.text.valueOf())
} else if (display.currentOperation.text == multiplication) {
display.text = Number(curVal) * Number(display.text.valueOf())
} else if (display.currentOperation.text == division) {
display.text = Number(Number(curVal) / Number(display.text.valueOf())).toString()
} else if (display.currentOperation.text == "=") {
}
if (op == "+" || op == "-" || op == multiplication || op == division) {
display.currentOperation.text = op
curVal = display.text.valueOf()
return
}
curVal = 0
display.currentOperation.text = ""
if (op == "1/x") {
display.text = (1 / display.text.valueOf()).toString()
} else if (op == "x^2") {
display.text = (display.text.valueOf() * display.text.valueOf()).toString()
} else if (op == "Abs") {
display.text = (Math.abs(display.text.valueOf())).toString()
} else if (op == "Int") {
display.text = (Math.floor(display.text.valueOf())).toString()
} else if (op == plusminus) {
display.text = (display.text.valueOf() * -1).toString()
} else if (op == squareRoot) {
display.text = (Math.sqrt(display.text.valueOf())).toString()
} else if (op == "mc") {
memory = 0;
} else if (op == "m+") {
memory += display.text.valueOf()
} else if (op == "mr") {
display.text = memory.toString()
} else if (op == "m-") {
memory = display.text.valueOf()
} else if (op == leftArrow) {
display.text = display.text.toString().slice(0, -1)
if (display.text.length == 0) {
display.text = "0"
}
} else if (op == "Off") {
Qt.quit();
} else if (op == "C") {
display.text = "0"
} else if (op == "AC") {
curVal = 0
memory = 0
lastOp = ""
display.text ="0"
}
}
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