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  1. #include <cctype>
  2. #include <iostream>
  3. #include <string>
  4.  
  5. float addition(float number1, float number2)
  6. {
  7. 	return number1 + number2;
  8. }
  9. float subtraction(float number1, float number2)
  10. {
  11.     return number1 - number2;
  12. }
  13. float multiplication(float number1, float number2)
  14. {
  15.     return number1 * number2;
  16. }
  17. float division(float number1, float number2)
  18. {
  19.     return number1 / number2;
  20. }
  21.  
  22. bool ask(const std::string& question) 
  23. {
  24.     std::cout << question;
  25.     char answer;
  26.     do {
  27.         std::cin >> answer;
  28.         answer = tolower(answer);
  29.         if(answer != 'y' && answer != 'n') std::cout << "invalid input\n";
  30.     } while(answer != 'y' && answer != 'n');
  31.     return answer == 'y';
  32. }
  33.  
  34.  
  35. void menu()
  36. {
  37. 	float num1;
  38.     float num2;
  39.     int choice;
  40.     std::cout << "\nCalculator function enabled. \n"
  41.                    "1: addition 2: subtraction 3: multiplication 4: division\n"
  42.                    "Your selection: ";
  43.     std::cin >> choice;
  44.     std::cout << '\n';
  45.     switch(choice) {
  46.     	case 1: std::cout << "You are doing an Addition\n"; break;
  47.     	case 2: std::cout << "You are doing a Subtraction\n"; break;
  48.     	case 3: std::cout << "You are doing a multiplication\n"; break;
  49.     	case 4: std::cout << "You are doing a division\n"; break;
  50.     	default: 
  51.     	    std::cout << "Invalid operation\n";
  52.     	    return;
  53.     }
  54. 	std::cout << "First Number: ";
  55.     std::cin >> num1;
  56.     std::cout << "Second Number: ";
  57.     std::cin >> num2;
  58.     if(choice == 4 && num2 == 0) {
  59.     	std::cout << "Inappropriate Operation\n";
  60.     	return;
  61.     }
  62.     std::cout << "Your answer is: ";
  63.     switch(choice) {
  64.     	case 1: std::cout << addition(num1, num2)       << '\n'; break;
  65.     	case 2: std::cout << subtraction(num1, num2)    << '\n'; break;
  66.     	case 3: std::cout << multiplication(num1, num2) << '\n'; break;
  67.     	case 4: std::cout << division(num1, num2) << '\n'; break;
  68.     }
  69. }
  70.  
  71.  
  72.  
  73. int main()
  74. {
  75. 	do {
  76. 	   menu();
  77. 	} while(ask("\nDo you want to do another operation? Y or N?"));
  78. }
Success #stdin #stdout 0s 3236KB
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stdin
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3 6 8 y 4 1 0 n
stdout
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Calculator function enabled. 
1: addition 2: subtraction 3: multiplication 4: division
Your selection: 
You are doing a multiplication
First Number: Second Number: Your answer is: 48

Do you want to do another operation? Y or N?
Calculator function enabled. 
1: addition 2: subtraction 3: multiplication 4: division
Your selection: 
You are doing a division
First Number: Second Number: Inappropriate Operation

Do you want to do another operation? Y or N?
https://ideone.com/ZLODpY
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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