buzzcode2007/XS-IBDP_Compsci-Java_Intro
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buzz-lightsnack-2007 2024-01-16 11:53:11 +08:00
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commit 1037fad955
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src/xs_ibdpcompsci_javaintro/practice1.java
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package xs_ibdpcompsci_javaintro;
import java.util.*;
class RPN_Calculator {
static ArrayList<Object> request_input() {
Scanner input = new Scanner(System.in);
// Initialize variables.
ArrayList<Object> USER_INPUTS = new ArrayList<Object>();
String USER_INPUT_CURRENT = "";
Boolean USER_INPUT_MORE = true;
// Loop for input.
do {
USER_INPUT_CURRENT = input.nextLine();
if (USER_INPUT_CURRENT.isEmpty() || USER_INPUT_CURRENT.isBlank()) {
USER_INPUT_MORE = false;
} else if (USER_INPUT_CURRENT.matches("-?\\d+(\\.\\d+)?")) {
USER_INPUTS.add(Float.parseFloat(USER_INPUT_CURRENT));
} else {
if (USER_INPUT_CURRENT.matches("[+\\-*\\/^]") && (USER_INPUTS.size() > 2)) {
USER_INPUTS.add(USER_INPUT_CURRENT);
} else if (USER_INPUT_CURRENT.toLowerCase() == "exit") {
System.exit(0);
} else {
// The user inputs a wrong code. Let the user edit it.
System.out.println("\\033[A");
};
};
} while (USER_INPUT_MORE == true);
input.close();
return (USER_INPUTS);
}
static float calculate(ArrayList<Object> ENTRIES_LIST, String OPERATION) {
// Calculate length.
int ENTRIES_LIST_LENGTH = ENTRIES_LIST.size();
float OPERATION_RESULT = (float) ENTRIES_LIST.get(0);
if (ENTRIES_LIST_LENGTH > 1) {
for (int ENTRY_CURRENT = 1; ENTRY_CURRENT < ENTRIES_LIST_LENGTH; ENTRY_CURRENT++) {
if (OPERATION == "+") {
OPERATION_RESULT += (float) ENTRIES_LIST.get(ENTRY_CURRENT);
} else if (OPERATION == "-") {
OPERATION_RESULT -= (float) ENTRIES_LIST.get(ENTRY_CURRENT);
};
};
};
return (OPERATION_RESULT);
};
public static void main(String[] args) {
// Initialize the input numbers.
ArrayList<Object> NUMBERS_INPUT = new ArrayList<Object>();
while (true) {
NUMBERS_INPUT = request_input();
}
}
}