1
h02
CS16 F19
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h02: Chapter 2: Variables and assignments, Input/output, Data types and expressions, Simple flow control

ready? assigned due points
true Thu 09/26 12:30PM Thu 10/10 12:30PM

You may collaborate on this homework with AT MOST one person, an optional "homework buddy".

UPLOAD A PDF OF YOUR ANSWERS TO GRADESCOPE BEFORE THE DUE DATE. ASSOCIATE EACH QUESTION WITH A SPECIFIC PAGE IN YOUR HOMEWORK AT THE TIME OF SUBMISSION. There is NO MAKEUP for missed assignments;

Please:

  • No Staples.
  • No Paperclips.
  • No folded down corners.

Complete your reading of Chapter 1, section 1.3 pages 27-32, Chapter 2 sections 2.1 thru 2.4. Turn your homework in during lecture.

    1. (6 pts) The author describes the difference between "syntax errors" and "logic errors", and also the difference between syntax errors that produce an "error message" vs. those that produce a "warning message". Briefly explain each of the items below in a way that makes the DIFFERENCES among them clear:
    i. Syntax errors that result in an error message:
    ii. Syntax errors that result in an warning message:
    iii. Logic errors:
    2. (2 pt) If the following statement were in a C++ program, what would it do?
    cout >> "I love oranges and apples";
    3. (2 pt) If the following statement were in a C++ program, what would it do?
    cout << "The world goes round and round"
    4. (4 pts) Show 2 different ways to initialize variables in C++?
    5. (2 pts) Is this variable declaration statement in C++ a good one? Why or why not?

    double int=30;

    6. (4 pts) Write an if-else statement that outputs the string "Grade is B" if the variable `score` is between 80 and 90 (both limits included). Otherwise the if-else statement should output "Grade is not B" ?
    7. (5 pts) The program below intends to do the following: Repeatedly prompt the user to input an integer number. When the user no longer wants to continue entering numbers, output the sum of all the positive numbers entered by the user followed by the sum of all the negative numbers entered by the user. However, the given program has errors. Mark all logical and syntax errors in the program and provide corrections in the space provided to the right. Add missing statements if any. 
    #include <iostream>

int main(){

    int a , sumPositive, sumNegative;

    string promptContinue ="\nTo continue enter Y/y\n";

    string promptNum = "\nEnter a number: ";

    char response;

    while (response = 'y'||`Y') {

       cout << promptNum;

       cin >> a;

       if(a)
          sumPositive+=a;

       else
          sumNegative+=a;

       cout<< promptContinue;



    }

    cout<< "Sum of all the positive numbers is: "<< sumPositive<<endl;

    cout<< "Sum of all the negative numbers is: "<< sumNegative<<endl;

    return 0;
}