68 lines
2.1 KiB
Java
68 lines
2.1 KiB
Java
// Importing basic stuff
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import java.io.*; // Used for I/O operations
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import java.util.*; // Contains basic utilities
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class A3 {
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// Class name has to be same as file name for Java
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static {
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// Used for loading the .so (on Linux) or .dll (on Windows) file when running
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// This is the main so called "dynamic library"
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System.loadLibrary("A3");
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}
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// Function declaration
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// private indicates the function is private, duh!
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// Use of native indicates the function body will be written in a language other than Java, such as C/C++
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private native int add(int a, int b); // For addition
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private native int sub(int a, int b); // For subtraction
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private native int mul(int a, int b); // For multiplication
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private native int div(int a, int b); // For division
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public static void main(String[] args) { // the main function
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Scanner sc = new Scanner(System.in); // For taking input
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int a, b;// Declaring variables for calculation
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int choice = 0; // Declaring variable for switch-case
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// Take input for a and b values
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System.out.print("\nValue of a:\t");
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a = sc.nextInt();
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System.out.print("\nValue of b:\t");
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b = sc.nextInt();
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// Main menu
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while (true) {
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System.out.println("----- MAIN MENU -----");
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System.out.println("1 -> Addition");
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System.out.println("2 -> Subtraction");
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System.out.println("3 -> Multiplication");
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System.out.println("4 -> Division");
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System.out.println("5 -> Exit");
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System.out.println("Choose an option:\t");
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choice = sc.nextInt();
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switch (choice) {
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case 1:
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System.out.println("Result: " + new A3().add(a, b));
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break;
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case 2:
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System.out.println("Result: " + new A3().sub(a, b));
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break;
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case 3:
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System.out.println("Result: " + new A3().mul(a, b));
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break;
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case 4:
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System.out.println("Result: " + new A3().div(a, b));
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break;
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case 5:
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System.out.println("## END OF CODE");
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System.exit(0);
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default:
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System.out.println("Please choose a valid option.");
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break;
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}
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}
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}
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}
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