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#include <iostream>
#include <math.h>
using namespace std;
/**
* Provides a command line calculator. Allows unary (e.g., sin, cos, tan) and
* binary (e.g., +, -, /) operators.
*
* @return The exit status; 0 means success, 1 means bad input.
*/
int main()
{
char operatorType;
string theOperator;
float operand1, operand2, result;
// Prompt the user for the type of calculation to perform.
cout << "Hi! Would you like to use a [b]inary or [u]nary operator? ";
cin >> operatorType;
}
// Parse the operator type.
// Binary operator.
if( operatorType == 'b' )
{
// Read the operands and operator from the user.
cout << "Please enter the first operand: ";
cin >> operand1;
cout << "Please enter the operator [*,-,/,+,^]: ";
cin >> theOperator;
cout << "Please enter the second operand: ";
cin >> operand2;
// Parse the operator.
if( theOperator == "*" )
{
result = operand1 * operand2;
}
else if( theOperator == "/" )
{
result = operand1 / operand2;
}
else if( theOperator == "+" )
{
result = operand1 + operand2;
}
else if( theOperator == "-" )
{
result = operand1 - operand2;
}
else if( theOperator == "^" )
{
result = pow(operand1, operand2);
}
else
{
cout << "You entered an invalid binary operator." << endl;
return 1;
}
// Output the result.
cout << "Result: " << result << endl;
}
// Unary operator.
else if( operatorType == 'u')
{
// Read the operand and operator from the user.
cout << "Please enter the operator [sin,cos,tan,-]: ";
cin >> theOperator;
cout << "Please enter the operand: ";
cin >> operand1;
// Parse the operator.
if( theOperator == "sin" )
{
result = sin(operand1);
}
else if( theOperator == "cos" )
{
result = cos(operand1);
}
else if( theOperator == "tan" )
{
result = tan(operand1);
}
else if( theOperator == "-" )
{
result = -operand1;
}
else
{
cout << "You entered an invalid unary operator." << endl;
return 1;
}
// Output the result.
cout << "Result: " << result << endl;
}
// Bad input.
else
{
cout << "You entered an invalid operator type." << endl;
return 1;
}
return 0;
}
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