Charlie, a novice programmer, is developing a simple calculator program to perform basic arithmetic operations. He needs your assistance in refining the program.Write a program that takes an operator ('+', '-', '*', or '/') and two operands as input. The program should then perform the corresponding operation and display the result. If the input is an invalid operator, the program should display an appropriate error message.Function Specifications:double add(double x, double y)double subtract(double x, double y)double multiply(double x, double y)double divide(double x, double y)Input format :The first line of input consists of a character c, representing the operator (+, -, *, /).The second line consists of two space-separated double values a and b, representing the operands.Output format :
Question
Charlie, a novice programmer, is developing a simple calculator program to perform basic arithmetic operations. He needs your assistance in refining the program.Write a program that takes an operator ('+', '-', '*', or '/') and two operands as input. The program should then perform the corresponding operation and display the result. If the input is an invalid operator, the program should display an appropriate error message.Function Specifications:double add(double x, double y)double subtract(double x, double y)double multiply(double x, double y)double divide(double x, double y)Input format :The first line of input consists of a character c, representing the operator (+, -, *, /).The second line consists of two space-separated double values a and b, representing the operands.Output format :
Solution
Sure, here is a simple program in C++ that fulfills your requirements:
#include <iostream>
using namespace std;
double add(double x, double y) {
return x + y;
}
double subtract(double x, double y) {
return x - y;
}
double multiply(double x, double y) {
return x * y;
}
double divide(double x, double y) {
if(y != 0)
return x / y;
else {
cout << "Error! Division by zero is not allowed.";
return 0;
}
}
int main() {
char operator;
double num1, num2;
cout << "Enter operator: ";
cin >> operator;
cout << "Enter two operands: ";
cin >> num1 >> num2;
switch(operator) {
case '+':
cout << "Result: " << add(num1, num2);
break;
case '-':
cout << "Result: " << subtract(num1, num2);
break;
case '*':
cout << "Result: " << multiply(num1, num2);
break;
case '/':
cout << "Result: " << divide(num1, num2);
break;
default:
cout << "Error! Invalid operator.";
break;
}
return 0;
}
This program first takes an operator and two operands as input. Then, it uses a switch statement to call the appropriate function based on the operator. If the operator is invalid, it displays an error message. The divide function also checks if the second operand is zero before performing the division to avoid a division by zero error.
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