58 lines
1.3 KiB
Plaintext
58 lines
1.3 KiB
Plaintext
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Quiz
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1. What is an expression?
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2. Is x = 5 + 7 an expression? What is its value?
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3. What is the value of 201 / 4?
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Depends on the datatype. If its an INT it would be 50. float would have the decimal. etc...
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4. What is the value of 201 % 4?
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0 because there would be a remainder so its not perfectly divisble
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5. If myAge, a, and b are all int variables, what are their values after
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myAge = 39;
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a = myAge++;
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b = ++myAge;
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6. What is the value of 8+2*3?
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14 - follows pemdas?
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7. What is the difference between if(x = 3) and if(x == 3)?
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Around page 80
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8. Do the following values evaluate true or false?
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a. 0
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b. 1
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c. –1
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d. x = 0
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e. x == 0 // assume that x has the value of 0
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------------------------------------------------
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Exercises
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1. Write a single if statement that examines two integer variables and changes the
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larger to the smaller, using only one else clause.
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2. Examine the following program. Imagine entering three numbers, and write what
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output you expect.
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#include <iostream>
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using namespace std;
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int main()
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{
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int a, b, c;
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cout << “Please enter three numbers\n”;
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cout << “a: “;
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cin >> a;
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cout << “\nb: “;
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cin >> b;
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cout << “\nc: “;
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cin >> c;
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if (c = (a-b))
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cout << “a: “ << a << “ minus b: “ << b << ” equals c: “ << c;
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else
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cout << “a-b does not equal c: “;
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return 0;
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}
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