Created
May 30, 2019 19:18
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Calculator in NodeJS terminal
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| const readline = require('readline'); | |
| const interface = readline.createInterface({ input: process.stdin, output: process.stdout }); | |
| const question = require('./question')(interface); | |
| const operaciones = { | |
| "1": { | |
| text: "Suma de dos números", | |
| method: (n1, n2) => n1 + n2 | |
| }, | |
| "2": { | |
| text: "Resta de dos números", | |
| method: (n1, n2) => n1 - n2 | |
| }, | |
| "3": { | |
| text: "Multiplicación de dos números", | |
| method: (n1, n2) => n1 * n2 | |
| }, | |
| "4": { | |
| text: "División de dos números", | |
| method: (n1, n2) => n1 / n2 | |
| }, | |
| "5": { | |
| text: "Salir" | |
| } | |
| }; | |
| async function main(){ | |
| console.log('\033[2J'); | |
| for (let clave in operaciones) { | |
| console.log(`${clave}.- ${operaciones[clave]["text"]}`); | |
| } | |
| let response = await question("Qué operación deseas realizar, escribe el número: "); | |
| if(response == "5"){ | |
| interface.close(); | |
| return; | |
| } | |
| let firstNumber = parseInt(await question("Dame el primer número: ")); | |
| let secondNumber = parseInt(await question("Dame el segundo número: ")); | |
| let result = operaciones[response]["method"](firstNumber,secondNumber); | |
| console.log(`El resultado es: ${result}`); | |
| await interface.question("Presiona Enter para continuar", () => main()); | |
| } | |
| main(); | |
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| const interface = require('readline-sync'); | |
| let response = ""; | |
| do{ | |
| console.log("1.- Suma"); | |
| console.log("2.- Resta"); | |
| console.log("3.- Multiplicación"); | |
| console.log("4.- Divisón"); | |
| console.log("5.- Salir"); | |
| response = interface.question("Qué operación deseas realizar, escribe el número: "); | |
| if(response != "5"){ | |
| let firstNumber = interface.question("Dame el primer número: "); | |
| let secondNumber = interface.question("Dame el segundo número: "); | |
| switch (response) { | |
| case "1": | |
| var result = parseInt(firstNumber) + parseInt(secondNumber); | |
| console.log("El resultado es: "+result); | |
| break; | |
| case "2": | |
| var result = parseInt(firstNumber) - parseInt(secondNumber); | |
| console.log("El resultado es: " + result); | |
| break; | |
| case "3": | |
| var result = parseInt(firstNumber) * parseInt(secondNumber); | |
| console.log("El resultado es: " + result); | |
| break; | |
| case "4": | |
| var result = parseInt(firstNumber) / parseInt(secondNumber); | |
| console.log("\n\n El resultado es: " + result + "\n\n"); | |
| break; | |
| } | |
| } | |
| }while(response != "5") |
Program execution finishes when the result is given.
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//node v16.13.1
const readline = require('readline');
const { stdin: input, stdout: output } = require('process');
const leer = readline.createInterface({ input, output });
const util = require('util');
const question = util.promisify(leer.question).bind(leer);
//menu
const operaciones = {
"1": {
text: "Suma",
method: (x, y) => x + y
},
"2": {
text: "Resta",
method: (x, y) => x - y
},
"3": {
text: "Multiplicación",
method: (x, y) => x * y
},
"4": {
text: "División",
method: (x, y) => x / y
},
"5": {
text: "Salir"
}
};
async function main(){
//mostrar menu
for (let i in operaciones) {
console.log(
${i}.- ${operaciones[i]["text"]});}
let response = await question("Qué operación deseas realizar, escribe el número: ");
if(response == "5"){
leer.close();
return;
}
let n1 = parseInt(await question("primer número: "));
let n2 = parseInt(await question("segundo número: "));
let result = operaciones[response]"method";
console.log(
El resultado es: ${result});await question("Presiona Enter para continuar", () => main());
leer.close();
}
main();