Adding variable error for calculator
I get an error message at the 'comReal1 + comReal2 = comSumR;' part and it is completely beyond me as to why. Help would be appreciated!
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#include <iostream> // saves basic input output functions
using namespace std;
int main()
{
char option;
char optionSim;
int sim1, sim2, simSum;
char optionCom;
int comReal1, comImag1, comReal2, comImag2, comSumR, comSumI;
int imag;
do //do while loop, shows menu until user exits
{
// shows Options for the menu
cout << "1) Simple Number Calculator " << endl;
cout << "2) Complex Number Calculator " << endl;
cout << "3) Calculate Capacitance " << endl;
cout << "4) Calculate Reactance " << endl << endl;
cout << "Q) Quit Program " << endl;
//user input's a number
cout << "Please select an option : ";
cin >> option; // taking option value as input and saving in variable "option"
option = toupper(option); // check for upper case 'Q'
if (option == '1') // Simple Calc
{
cout << "Do you want to do... " << endl;
cout << "1) Addition " << endl;
cout << "2) Subtraction " << endl;
cout << "3) Multiplication " << endl;
cout << "4) Division " << endl;
cout << "5) Go back to main " << endl << endl;
cout << "Please select an option : " << endl;
cin >> optionSim;
if (optionSim == '1')
{
cout << "Please input your numbers: " << endl << endl;
cin >> sim1;
cin >> sim2;
simSum = sim1 + sim2;
cout << "The sum of those numbers are " << simSum << endl << endl;
}
else if (optionSim == '2')
{
cout << "Please input your numbers: " << endl << endl;
cin >> sim1;
cin >> sim2;
simSum = sim1 - sim2;
cout << "The sum of those numbers are " << simSum << endl << endl;
}
else if (optionSim == '3')
{
cout << "Please input your numbers: " << endl << endl;
cin >> sim1;
cin >> sim2;
simSum = sim1 * sim2;
cout << "The sum of those numbers are " << simSum << endl << endl;
}
else if (optionSim == '4')
{
cout << "Please input your numbers: " << endl << endl;
cin >> sim1;
cin >> sim2;
simSum = sim1 / sim2;
cout << "The sum of those numbers are " << simSum << endl << endl;
}
else if (optionSim == '5')
{
cout << "go back " << endl;
}
}
else if (option == '2') // Complex Calc
{
cout << "Do you want to do... " << endl;
cout << "1) Addition " << endl;
cout << "2) Subtraction " << endl;
cout << "3) Multiplication " << endl;
cout << "4) Division " << endl;
cout << "5) Go back to main " << endl << endl;
cout << "Please select an option : " << endl;
cin >> optionCom;
if (optionSim == '1') //addition
{
cout << "Given your question in the form '(a +- bi) + (c +- di) the answer will be given in rectangular form" << endl << endl;
cout << "What is the real part of the first number" << endl;
cin >> comReal1;
cout << "What is the imaginary multiplier of the first number" << endl;
cin >> comImag1;
cout << "What is the real part of the second number" << endl;
cin >> comReal2;
cout << "What is the imaginary multiplier of the second number" << endl;
cin >> comImag2;
comReal1 + comReal2 = comSumR; //add the real variable, then add the imaginary, put into line below
comImag1 + comImag2 = comSumI;
cout <<"Your answer is "<<[comSumR]<<" + "<<[comSumI]<<"i" << endl;
}
else if (optionSim == '2')
{
}
else if (optionSim == '3')
{
}
else if (optionSim == '4')
{
}
else if (optionSim == '5')
{
cout << "go back " << endl;
}
}
else if (option == '3') // Capacitance
{
cout << "Do some Capacitance calcs here." << endl << endl;
}
else if (option == '4') // Reactance
{
cout << "Do a little Reactance calc here." << endl << endl;
}
else if (option == 'Q') // Exit
{
cout << "Terminating Program" << endl << endl << endl;
}
else
{
//Displaying error message
cout << "Invalid Option entered" << endl << endl;
}
} while (option != 'Q'); //condition of do-while loop
cout << "Program is finished!!" << endl << endl << endl;
return 0;
}
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The = operator assigns what's on the right side to what's on the left side.
comReal1 + comReal2 is not a variable so giving it the value of comSumR doesn't make sense.
Last edited on
an assignment in C[++] is always right to left. Hence lines 103/104 must be:
1
2
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comSumR = comReal1 + comReal2; //add the real variable, then add the imaginary, put into line below
comSumI = comImag1 + comImag2;
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Further more: What is your intention regarding the [] on line 106? In C[++] they have special meaning (lambda, array). You cannot use them like so.
EDIT: Line 89:
optionCom is set but later
optionSim is checked
Last edited on
Got in sorted now thank you! Knew it would have been a silly mistake.
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