Introduction
  • In this blog, I am going to explain how to do simple calculations by using a calculator.
Software Requirements
  • Turbo C++ or C.
Programming
  1. #include < stdio.h >
  2. int main()
  3. {
  4. char operator;
  5. double firstNumber, secondNumber;
  6. printf("Enter an operator (+, -, *,): ");
  7. scanf("%c", & operator);
  8. printf("Enter two operands: ");
  9. scanf("%lf %lf", & firstNumber, & secondNumber);
  10. switch (operator)
  11. {
  12. case '+':
  13. printf("%.1lf + %.1lf = %.1lf", firstNumber, secondNumber, firstNumber + secondNumber);
  14. break;
  15. case '-':
  16. printf("%.1lf - %.1lf = %.1lf", firstNumber, secondNumber, firstNumber - secondNumber);
  17. break;
  18. case '*':
  19. printf("%.1lf * %.1lf = %.1lf", firstNumber, secondNumber, firstNumber * secondNumber);
  20. break;
  21. case '/':
  22. printf("%.1lf / %.1lf = %.1lf", firstNumber, secondNumber, firstNumber / firstNumber);
  23. break;
  24. default:
  25. printf("Error! operator is not correct");
  26. }
  27. return 0;
  28. }
Explanation
  • By the programming given above, the calculations of addition, subtraction, multiplication and division can be done and explained in a simple manner.

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Output

Output
Conclusion: Thus the simple calculator can get created successfully.