1. Suppose num1 and num2 are int variables and symbol is a char variable. Consid
ID: 667793 • Letter: 1
Question
1. Suppose num1 and num2 are int variables and symbol is a char variable. Consider the following input:
47 18 * 28 $
What value (if any) is assigned to num1, num2, and symbol after each of the following statements executes? (Use the same input for each statement.)
a. cin >> num1 >> symbol >> num2;
b. cin >> symbol >> num1 >> num2;
c. cin >> num1;
cin.get(symbol);
cin >> num2;
d. cin >> num1 >> num2;
cin.get(symbol);
e. cin.get(symbol);
cin >> num1 >> num2;
2. Suppose num1 and num2 are int variables and x and y are double variables. Assume the following input data:
35 28.30 67 12.50
What value (if any) is assigned to num1, num2, x, y after each of the following statements executes? (Use the same input for each statement.)
c. cin >> x >> y >> num1 >> num2;
d. cin >> num1 >> num2 >> x >> y;
e. cin >> num1 >> x >> y >> num2;
f. cin >> x >> num1 >> num2 >> y;
3. Suppose x and y are int variables and symbol is a char variable. Assume the following input data:
38 26 * 67 33
24 $ 55 # 34
# & 63 85
What value (if any) is assigned to x, y, and symbol after each of the following statements executes? (Use the same input for each statement.)
a. cin >> x >> y;
cin.ignore(100, ' ');
cin >> symbol;
b. cin >> x;
cin.ignore(100, '*');
cin >> y;
cin.get(symbol);
c. cin >> y;
cin.ignore(100, ' ');
cin >> x >> symbol;
d. cin.get(symbol);
cin.ignore(100, '*');
cin >> x;
cin.ignore(100, ' ');
cin >> y;
e. cin.ignore(100, ' ');
cin >> x >> symbol;
cin.ignore(100, ' ');
cin.ignore(100, '&');
cin >> y;
4. Suppose that x and y are int variables, z is a double variable, and ch is a char variable. Suppose the input statement is:
cin >> x >> y >> ch >> z;
What values, if any, are stored in x, y, z, and ch if the input is:
a. 35 62.78
b. 86 32A 92.6
c. 12 .45A 32
5. Suppose that num is an int variable and discard is a char variable. Assume the following input data:
#34
What value (if any) is assigned to num and discard after each of the following statements executes? (Use the same input for each statement.)
a. cin.get(discard);
cin >> num;
b. discard = cin.peek();
cin >> num;
c. cin.get(discard);
cin.putback(discard);
cin >> discard;
cin >> num;
6. Given the input:
12.8 Bill 15
and the variable declaration:
double x = 3.5;
int y = 18;
string name = "Lisa";
What is the output, if any? Use the same input for each part.
a. cin >> x >> name >> y;
cout << x << " " << y << " " << name << endl;
b. cin >> y >> x >> name;
cout << x << " " << y << " " << name << endl;
c. cin >> x >> y >> name;
cout << x << " " << y << " " << name << endl;
7. Suppose that name is variable of type string. What is the effect of the following statement?
getline(cin, name);
8. Suppose that age is an int variable and name is a string variable. What are the values of age and name after the following input statements execute:
cin >> age;
getline(cin, name);
if the input is:
a. 23 Lance Grant
b. 23
Lance Grant
Explanation / Answer
1.
a.
num1 = 47
symbol = 1
num2 = 8
Explanation:
· The value of num1 is 47 because 47 is assigned to num1.
· The value of symbol is 1 because the next character is 1.
· The value of num2 is 8 because 8 is next integer value after the character “1”.
b.
num1 = 7
symbol = 4
num2 = 18
Explanation:
· The value of symbol is 4 because the first character is 4.
· The value of num1 is 7 because 7 is the next integer value after the character “4”.
· The value of num2 is 18 because the next integer value is 18.
c.
num1 = 47
symbol = space
num2 = 18
Explanation:
· The value of num1 is 47 because 47 is assigned to num1.
· The value of symbol is space ( ) because the next character is space.
· The value of num2 is 18 because 18 is next integer value after the character
“ ”.
d.
num1 = 47
symbol = space
num2 = 18
Explanation:
· The value of num1 is 47 because 47 is assigned to num1.
· The value of num2 is 18 because 18 is next integer value
· The value of symbol is space ( ) because the next character is space.
e.
num1 = 7
symbol = 4
num2 = 18
· The value of symbol is 4 because the first character is 4.
· The value of num1 is 7 because 7 is the next integer value after the character “4”.
· The value of num2 is 18 because the next integer value is 18.
2.
a.
num1 = 28
num2 = 67
x = 35
y = 0.3
Explanation:
· The value of num1 is 28 because num1 is of int type.
· The value of num2 is 67 because 67 is assigned to num2.
· The value of x is 35 because first value is 35.
· The value of y is 0.3 because of num1 is of type int, the compiler considered the next value i.e. y is 0.3.
b.
num1 = 35
num2 = 67
x = 28.3
y = 12.50
Explanation:
· The value of num1 is 35 because num1 is of int type.
· The value of num2 is 67 because 67 is assigned to num2.
· The value of x is 28.3.
· The value of y is 12.50.
c.
num1 = 67
num2 = 12
x = 35
y = 28.3
Explanation:
· The value of num1 is 67 because 67 is assigned to num1.
· The value of num2 is 12 because num2 is of type int.
· The value of x is 35 because first value is 35.
· The value of y is 28.3.
d.
num1 = 35
num2 = 28
x = 0.3
y = 67
Explanation:
· The value of num1 is 35 because first value is 35.
· The value of num2 is 28 because num2 is of type int.
· The value of x is 0.3 because of num2 is of type int, the compiler considered the next value i.e. x is 0.3.
· The value of y is 67.
e.
num1 = 35
num2 = 12
x = 28.3
y = 67
Explanation:
· The value of num1 is35 because first value is 35.
· The value of num2 is 12 because num2 is of type int.
· The value of x is 28.3.
· The value of y is 67.
f.
num1 = 28
num2 = 0
x = 35
y = garbage
Explanation:
· The value of num1 is 28 because num1 is of type int.
· The value of num2 is 0 because num2 is of type int. Thus, it will take 0.
· The value of x is 35.
· The value of y is Garbage.
3.
a.
x = 38
y = 26
symbol = 2
Explanation:
· The value of x is 38.
· The value of y is 26
· The value of symbol is 2 because of the statement cin.ignore(100,’ ’), the execution will come at next line and print 2 on the screen.
b.
x = 38
y = 26
symbol = space
Explanation:
· The value of x is 38.
· The value of y is 26
· The value of symbol is 2 because of the statement cin.ignore(100,’*’), the execution will come at next character which is space.
c.
x = 24
y = 38
symbol = $
Explanation:
· The value of x is 24 because of the statement cin.ignore(100,’ ’), the execution will come at next line and print 24 on the screen.
· The value of y is 38 because of first value.
· The value of symbol is $ because of the statement cin.ignore(100,’ ’), the execution will come at next line and print $ on the screen.
d.
x = 67
y = 24
symbol = 3
Explanation:
· The value of x is 67 because of the statement cin.ignore(100,’*’).
· The value of y is 24 because of the statement cin.ignore(100,’ ’), the execution will come at next line and print 24 on the screen.
· The value of symbol is 3 because of first character.
e.
x = 24
y = 63
symbol = $
Explanation:
· The value of x is 24 because of the statement cin.ignore(100,’ ’), the execution will come at next line and print 24 on the screen.
· The value of y is 67 because of the statement cin.ignore(100,’&’).
· The value of symbol is $ because of the statement cin.ignore(100,’ ’), the execution will come at next line and print $ on the screen.
4.
a.
x = 35
y = 62
z = 78
ch = .
Explanation:
· The value of x is 35.
· The value of y is 62.
· The value of z is 78 because next number after character is 78.
· The value is ch is..
b.
x = 86
y = 32
z = 92.6
ch = A
Explanation:
· The value of x is 86.
· The value of y is 32.
· The value of z is 92.6 because next number after character is 92.6.
· The value is ch is A.
c.
x = 12
y = 0
z = garbage value
ch = space
Explanation:
· The value of x is 12.
· The value of y is 0 because y is of int type.
· The value of z is garbage because the program will not take the next value.
· The value is ch is space.
5.
a.
num = 34
discard = #
Explanation:
· The value of num is 34.
· The value of discard is # because discard is of char type.
b.
num = 0
discard = #
Explanation:
· The value of num is 0 because of the statement discard = cin.peek(),all other value will be 0.
· The value of discard is # because discard is of char type.
c.
num = 34
discard = #
Explanation:
· The value of num is 34.
· The value of discard is # because discard is of char type.
6.
a.
12.8 15 Bill
Explanation:
· The value 12.8 is assigned to x.
· The value 15 is assigned to y.
· Bill will assign to name.
b.
0.8 12 Bill
Explanation:
· The value 0.8 is assigned to x because first 12 will assign to y.
· The value 12 is assigned to y.
· Bill will assign to name.
c.
12.8 0 Lisa
Explanation:
· The value 12.8 is assigned to x.
· The value 0 is assigned to y because in the cin statement string value is assigned to integer.
· Lisa will assign to name.
7.
getline(cin, name) reads the whole string till it encounters the newline.
8.
a.
age = 23
name = Lance Grant
Explanation:
· 23 will be assigned to age.
· Lance Grant will be assigned to name.
b.
age = 23
name = NULL
Explanation:
· 23 will be assigned to age.
· Null will be assigned to name because input is in next line.
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