CSC133 Intro to CS Using C++ - If Statement Worksheet

If Statement Worksheet

For each of the following, correct the syntax errors.

1.  if x > 25.0
       y = x
    else
       y = z;

2.  if (x >> 0);
       cout << "positive " << x << endl;
    else;
       cout << "negative " << x << endl;




What is the output of each of the following statements? Assume that
x = 5, y = 2, z = 10, and temp = 0

3.  if (y >= x)
       y = z;
    cout << x << "  " << y << "  " << z << endl;

4.  if (y >= x)
    {
       y = z;
       cout << x << "  " << y << "  " << z << endl;
    }

5.  if (z < y)
       temp = x;
       x = z;
    z = temp;
    cout << x << "  " << y << "  " << z << endl;

6.  if (z > y)
    {
       temp = x;
       x = z;
       z = temp;
    }
    cout << x << "  " << y << "  " << z << endl;

7.  if (x >= 6)
    cout << x + y << endl;
    cout << x + y << endl;

8.  if (x + y > z)
       x = y + z;
    else
       x = y - z;
    cout << x << "  " << y << "  " << z << endl;

Write if statements for the following problems. Use meaningful variable names. You can assume that the variables you use are declared and have been initialized.

14. If a variable angle is equal to 90 degrees, print the message "right
    angle. Otherwise print the message "not a right angle".

15. If the difference between variables temp1 and temp2 is more than 2.3,
    set the variable approx to (temp1 - temp2) * factor.

16. A student at State U is ready to graduate if he or she has completed
    at least 122 credits. Write the statements to test whether a student
    is ready to graduate, and print a message telling whether he or she
    is ready.