EC327 Homework 2 Solved

Q1. Simple calculator.
Write a C++ program (Q1.cpp) that takes simple, one operand arithmetic operations from the command line and calculates the result. The program should accept signed integers as operands, and support the *, /, +, – operators. When provided to the command line, operands and operators should be separated by a space, in the following way:

3+5

For the division operator, you should treat it as a floating-point division (with decimals). You should consider the error conditions listed in the sample runs below and terminate the program if such a condition occurs.

Text in < > in the examples demonstrates the user inputs entered via the keyboard. The actual user inputs should not contain < or > signs.

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IMPORTANT NOTE: YOUR CODE WILL GO THROUGH AN AUTOMATED GRADER SO MAKE SURE YOUR CODE TAKES THE INPUTS AS IN THE ABOVE EXAMPLE AND ITS OUTPUT FORMAT IS EXACTLY “Result: …” AS IN THE ABOVE EXAMPLE.

Q2. Guessing game
Write a C++ program (Q2.cpp) that generates a random positive integer (between 1 and 10) and asks the user to guess it by taking input from the command line. The program should not terminate until the user successfully guesses the correct number. Upon every input from the user, you should validate that the input is a number, and display the proper error message as listed in the sample run. You should also help the user by guiding them towards the generated random number, printing if the guessed number was higher or lower compared to the generated random number.

See the following test cases for examples of how the program should behave.

To generate a random number, you should use the srand() function from the cstdlib library, as explained here: http://www.cplusplus.com/reference/cstdlib/srand/

IMPORTANT NOTE: YOUR CODE WILL GO THROUGH AN AUTOGRADER SO MAKE SURE YOUR CODE TAKES THE INPUTS AS THE ABOVE EXAMPLE AND ITS OUTPUTS ARE IN THE SAME FORMAT (SPACES, COMMAS, etc.).

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Q3. Pyramid
Write a program (Q3.cpp) that asks the user to provide a character, a signed integer between 1 and 20, preferred shape of pyramid (inverted or upright) and prints a “pyramid” on the screen, composed of the chosen character and with the chosen number as height. Upon receiving an invalid height, the program shouldn’t exit but it should print an error and ask the user to input another value (see sample run below). An invalid height is a number higher than 20, zero, a negative number, or a value that is not a number (e.g., ‘a’). You should also check for the shape of pyramid that the user enters, and make sure it is either U (upright) or I (inverted) (see sample run below). You can disregard the case in which the user inputs a decimal number.

IMPORTANT NOTE: YOUR CODE WILL GO THROUGH AN AUTOGRADER SO MAKE SURE YOUR CODE TAKES THE INPUTS AS THE ABOVE EXAMPLE AND ITS OUTPUTS ARE IN THE SAME FORMAT (SPACES, COMMAS, etc.).

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