Java: switching between binary and decimal "modes" on a calculator -
i've created 2 separate convoluted calculators, 1 calculates decimal numbers , calculates binary numbers.
the user inputs equation want calculated on command line , result printed.
>1+1 >2 or binary
>0b111 + 0b101 >0b1100 what i'm having trouble being able switch between calculating binary , decimal numbers on fly. i'd make work this: (by default in decimal mode)
>1+1 >2 >bin >0b111 + 0b101 = 0b1100 >dec >5 * 10 >50 >exit (while typing exit @ point exit program)
is there way can pull off?
//decimal calculator import java.util.*; public class decarithmetic { public static void main(string[] args) { scanner input = new scanner(system.in); while(true) { string equation = input.nextline(); if (equation.equalsignorecase("exit")) { system.exit(0); } equation = equation.replaceall("\\s+",""); int oplocation = equation.indexof("+"); if(oplocation == -1) { oplocation = equation.indexof("-"); } if(oplocation == -1) { oplocation = equation.indexof("*"); } if(oplocation == -1) { oplocation = equation.indexof("/"); } if(oplocation == -1) { oplocation = equation.indexof("|"); } if(oplocation == -1) { oplocation = equation.indexof("&"); } if(oplocation == -1) { oplocation = equation.indexof("^"); } string number = equation.substring(0,oplocation); int operandone = integer.parseint(number); number = equation.substring(oplocation + 1); int operandtwo = integer.parseint(number); string op = equation.substring(oplocation, oplocation+1); int result = calculate(op, operandone, operandtwo); system.out.println(result); } } public static int calculate(string operator, int operandone, int operandtwo) { if(operator.equals("+") == true) { return operandone + operandtwo; } else if(operator.equals("-") == true) { return operandone - operandtwo; } else if(operator.equals("*") == true) { return operandone * operandtwo; } else if(operator.equals("/") == true) { return operandone / operandtwo; } else if(operator.equals("^") == true) { return operandone ^ operandtwo; } else if (operator.equals("|") == true) { return operandone | operandtwo; } else if(operator.equals("&") == true) { return operandone & operandtwo; } else { scanner scan = new scanner(system.in); system.out.println("please enter valid operator. (+, -, *, /, ^, |, &)"); return calculate(scan.nextline(), operandone, operandtwo); } } } //binary calculator import java.util.*; public class binaryarithmetic { public static void main(string[] args) { scanner input = new scanner(system.in); while(true) { string equation = input.nextline(); if (equation.equalsignorecase("exit")) { system.exit(0); } equation = equation.replaceall("\\s+",""); equation = equation.replaceall("0b",""); int oplocation = equation.indexof("+"); if(oplocation == -1) { oplocation = equation.indexof("-"); } if(oplocation == -1) { oplocation = equation.indexof("*"); } if(oplocation == -1) { oplocation = equation.indexof("/"); } if(oplocation == -1) { oplocation = equation.indexof("|"); } if(oplocation == -1) { oplocation = equation.indexof("&"); } if(oplocation == -1) { oplocation = equation.indexof("^"); } string number = equation.substring(0,oplocation); int bin1 = integer.parseint(number); string b1 = integer.tostring(bin1); int operandone = integer.parseint(b1, 2); number = equation.substring(oplocation + 1); int bin2 = integer.parseint(number); string b2 = integer.tostring(bin2); int operandtwo = integer.parseint(b2, 2); string op = equation.substring(oplocation, oplocation+1); string result = integer.tobinarystring(calculate(op, operandone, operandtwo)); system.out.println("0b"+result); } } public static int calculate(string operator, int operandone, int operandtwo) { if(operator.equals("+") == true) { return operandone + operandtwo; } else if(operator.equals("-") == true) { return operandone - operandtwo; } else if(operator.equals("*") == true) { return operandone * operandtwo; } else if(operator.equals("/") == true) { return operandone / operandtwo; } else if(operator.equals("^") == true) { return operandone ^ operandtwo; } else if (operator.equals("|") == true) { return operandone | operandtwo; } else if(operator.equals("&") == true) { return operandone & operandtwo; } else { scanner scan = new scanner(system.in); system.out.println("please enter valid operator. (+, -, *, /, ^, |, &)"); return calculate(scan.nextline(), operandone, operandtwo); } } }
have main class called calculator take input user. class have main method
if input dec, read nextline , pass decimal calculator
if input bin, read nextline , pass binary calculator
if input exit, exit.
if input neither dec, nor bin nor exit, assume user has entered decimal equation , call decimal calculator.
try write code per have suggested. if struggle, can out.
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