Concept explainers
Each of the following declarations and program segments has errors. Locate as many as you can.
A) int ptr*;
B) int x, *ptr;
&x = ptr;
C) int x, *ptr;
*ptr = &x;
D) int x, *ptr;
ptr = &x;
ptr =100; // Store 100 in x
cout << x << endl;
E) int numbers[] = {10, 20, 30, 40, 50};
cout << "The third element in the array is ";
cout << *numbers + 3 << endl;
F) int values[20], *iptr;
iptr = values;
iptr *= 2;
G) double level;
int dPtr = &level;
H) int *iptr = &ivalue;
int ivalue;
I) void doubleVal (int val)
{
*val *= 2;
}
J) int *pint;
new pint;
K) int *pint;
pint = new int;
pint = 100;
L) int *pint;
pint = new int[100]; // Allocate memory
.
.
Process the array
.
.
delete pint; // Free memory
delete pint; // Free memory
M) int *getNum()
{
int wholeNum;
cout << "Enter a number: ";
cin >> wholeNum;
return SwholeNum;
}
N) unique_ptr u = new unique_ptr(new int);
O) unique_ptr<int> u = make_unique<int>();
unique_ptr<int> v;
v = u;
P) unique_ptr<int>u(new int);
unique_ptr<int>v;
v.reset(u);
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Starting Out With C++: Early Objects, Student Value Edition & Myprogramminglab With Pearson Etext -- Standalone Access Card Package, 9/e
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