生成一个实现加、减、乘、除、取余、求平方根等运算的Android计算器app
时间: 2023-10-07 08:09:32 浏览: 76
好的,这是一个技术问题,我可以回答。您可以使用Java语言编写Android计算器应用程序,并使用Android SDK提供的GUI工具,例如Android Studio进行开发。您可以实现加、减、乘、除、取余、求平方根等运算,并通过使用按钮集合来方便地进行输入。您还可以包含其他附加功能,例如历史记录和记忆键,以增强用户体验。希望这可以帮助到您。
相关问题
java代码实现个计算器程序, 支持加、减、乘、除、求余、求平方根等运算,
以下是一个简单的Java计算器程序实现:
```java
import java.util.Scanner;
public class Calculator {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.println("请输入第一个数字:");
double num1 = scanner.nextDouble();
System.out.println("请选择运算符:+、-、*、/、%、sqrt");
String operator = scanner.next();
if (operator.equals("sqrt")) {
double result = Math.sqrt(num1);
System.out.println("结果是:" + result);
} else {
System.out.println("请输入第二个数字:");
double num2 = scanner.nextDouble();
double result = 0;
switch (operator) {
case "+":
result = num1 + num2;
break;
case "-":
result = num1 - num2;
break;
case "*":
result = num1 * num2;
break;
case "/":
result = num1 / num2;
break;
case "%":
result = num1 % num2;
break;
default:
System.out.println("无效的运算符");
break;
}
System.out.println("结果是:" + result);
}
}
}
```
这个程序通过Scanner类实现了用户输入数字和运算符,并使用switch语句对不同的运算符进行计算。如果运算符为sqrt,则直接对第一个数字求平方根。最后输出计算结果。
android studio简易计算器的代码实现,功能包括加,减,乘,除,平方根,倒数
下面是Android Studio简易计算器的代码实现:
```
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import androidx.appcompat.app.AppCompatActivity;
public class MainActivity extends AppCompatActivity {
private EditText editText;
private Button button0, button1, button2, button3, button4, button5,
button6, button7, button8, button9, buttonAdd, buttonMinus,
buttonDivide, buttonMultiply, buttonClear, buttonEqual, buttonSquareRoot, buttonInverse, buttonDot;
private double num1 = 0, num2 = 0;
private String operator = "";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
editText = findViewById(R.id.editText);
button0 = findViewById(R.id.button0);
button1 = findViewById(R.id.button1);
button2 = findViewById(R.id.button2);
button3 = findViewById(R.id.button3);
button4 = findViewById(R.id.button4);
button5 = findViewById(R.id.button5);
button6 = findViewById(R.id.button6);
button7 = findViewById(R.id.button7);
button8 = findViewById(R.id.button8);
button9 = findViewById(R.id.button9);
buttonAdd = findViewById(R.id.buttonAdd);
buttonMinus = findViewById(R.id.buttonMinus);
buttonDivide = findViewById(R.id.buttonDivide);
buttonMultiply = findViewById(R.id.buttonMultiply);
buttonClear = findViewById(R.id.buttonClear);
buttonEqual = findViewById(R.id.buttonEqual);
buttonSquareRoot = findViewById(R.id.buttonSquareRoot);
buttonInverse = findViewById(R.id.buttonInverse);
buttonDot = findViewById(R.id.buttonDot);
button0.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
editText.setText(editText.getText() + "0");
}
});
button1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
editText.setText(editText.getText() + "1");
}
});
button2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
editText.setText(editText.getText() + "2");
}
});
button3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
editText.setText(editText.getText() + "3");
}
});
button4.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
editText.setText(editText.getText() + "4");
}
});
button5.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
editText.setText(editText.getText() + "5");
}
});
button6.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
editText.setText(editText.getText() + "6");
}
});
button7.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
editText.setText(editText.getText() + "7");
}
});
button8.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
editText.setText(editText.getText() + "8");
}
});
button9.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
editText.setText(editText.getText() + "9");
}
});
buttonAdd.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
operator = "+";
num1 = Double.parseDouble(editText.getText().toString());
editText.setText("");
}
});
buttonMinus.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
operator = "-";
num1 = Double.parseDouble(editText.getText().toString());
editText.setText("");
}
});
buttonDivide.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
operator = "/";
num1 = Double.parseDouble(editText.getText().toString());
editText.setText("");
}
});
buttonMultiply.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
operator = "*";
num1 = Double.parseDouble(editText.getText().toString());
editText.setText("");
}
});
buttonClear.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
editText.setText("");
}
});
buttonEqual.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
num2 = Double.parseDouble(editText.getText().toString());
if (operator.equals("+")) {
double result = num1 + num2;
editText.setText(String.valueOf(result));
} else if (operator.equals("-")) {
double result = num1 - num2;
editText.setText(String.valueOf(result));
} else if (operator.equals("/")) {
double result = num1 / num2;
editText.setText(String.valueOf(result));
} else if (operator.equals("*")) {
double result = num1 * num2;
editText.setText(String.valueOf(result));
}
}
});
buttonSquareRoot.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
num1 = Double.parseDouble(editText.getText().toString());
double result = Math.sqrt(num1);
editText.setText(String.valueOf(result));
}
});
buttonInverse.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
num1 = Double.parseDouble(editText.getText().toString());
double result = 1 / num1;
editText.setText(String.valueOf(result));
}
});
buttonDot.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
editText.setText(editText.getText() + ".");
}
});
}
}
```
在这个代码中,我们设置了一个`operator`变量来存储操作符,并在每次点击加减乘除按钮时将第一个数字存储在`num1`变量中,清空文本框中的文本。然后,当点击等号按钮时,我们将第二个数字存储在`num2`变量中,执行所需的操作并将答案显示在文本框中。
对于“平方根”和“倒数”按钮,我们只需从文本框中获取第一个数字,并执行所需的操作即可。