9 // printAnswer) to print the equation on the 'screen 10 function promptUser() { 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 let x = Number (prompt("Enter first number:")); let operator = prompt("Enter operator (+, -, *, or /):"); let y = Number (prompt("Enter second number:")); let answer = calc (x, operator, y); printAnswer(x, operator, y, answer); } // This function takes the two numbers and an operator as input. // It returns the answer for the equation. // If the operator is not +, -, *, or /, then it returns NaN. function calc(x, operator, y) { if (operator === "+") { return x + y } if (operator=== "-") { return x - y } if (operator ==="*") { return x * y } if (operator==="/") { return y !== 0 ? x/y: NaN; return NaN; } // This function prints the equation to the "screen" ("calculatorDisplay") // in tags, but does not overwrite what was previously there. // If the answer is NaN is should use the class "bad Input" to make the // text red. This is the only function that should call document.getElementById(). function printAnswer(x, operator, y, answer) { let display = document.getElementById("calculatorDisplay"); let paragraph = document.getElementById("p"); if (isNaN (answer)){ C paragraph.className ="badinput";
9 // printAnswer) to print the equation on the 'screen 10 function promptUser() { 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 let x = Number (prompt("Enter first number:")); let operator = prompt("Enter operator (+, -, *, or /):"); let y = Number (prompt("Enter second number:")); let answer = calc (x, operator, y); printAnswer(x, operator, y, answer); } // This function takes the two numbers and an operator as input. // It returns the answer for the equation. // If the operator is not +, -, *, or /, then it returns NaN. function calc(x, operator, y) { if (operator === "+") { return x + y } if (operator=== "-") { return x - y } if (operator ==="*") { return x * y } if (operator==="/") { return y !== 0 ? x/y: NaN; return NaN; } // This function prints the equation to the "screen" ("calculatorDisplay") // in tags, but does not overwrite what was previously there. // If the answer is NaN is should use the class "bad Input" to make the // text red. This is the only function that should call document.getElementById(). function printAnswer(x, operator, y, answer) { let display = document.getElementById("calculatorDisplay"); let paragraph = document.getElementById("p"); if (isNaN (answer)){ C paragraph.className ="badinput";
C++ for Engineers and Scientists
4th Edition
ISBN:9781133187844
Author:Bronson, Gary J.
Publisher:Bronson, Gary J.
Chapter6: Modularity Using Functions
Section6.4: A Case Study: Rectangular To Polar Coordinate Conversion
Problem 9E: (Numerical) Write a program that tests the effectiveness of the rand() library function. Start by...
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Question
Why is this not printing (JavaScript)
Transcribed Image Text:9
// printAnswer() to print the equation on the "screen".
10 function promptUser() {
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let x = Number(prompt("Enter first number:"));
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let operator = prompt("Enter operator (+, -, *, or /):");
let y = Number(prompt("Enter second number:"));
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let answer = calc(x, operator, y);
printAnswer(x, operator, y, answer);
}
// This function takes the two numbers and an operator as input.
// It returns the answer for the equation.
// If the operator is not +, -, *, or /, then it returns NaN.
function calc(x, operator, y) {
if (operator === "+"){
return x + y
}
if (operator=== "-") {
return x - y
}
if (operator==="*") {
return x * y
}
if (operator ==="/") {
}
}
return y !== 0 ? x/y: NaN;
}
return NaN;
}
// This function prints the equation to the "screen" ("calculatorDisplay")
// in <p> tags, but does not overwrite what was previously there.
// If the answer is NaN is should use the class "badInput" to make the
// text red. This is the only function that should call document.getElementById().
function printAnswer(x, operator, y, answer) {
let display = document.getElementById("calculatorDisplay");
let paragraph
=
if (isNaN (answer)){
document.getElementById("p");
paragraph.className ="badinput";
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