/C++/How to dynamically allocate an array c++

How to dynamically allocate an array c++

int* a = NULL;   // Pointer to int, initialize to nothing.
int n;           // Size needed for array
cin >> n;        // Read in the size
a = new int[n];  // Allocate n ints and save ptr in a.
for (int i=0; i<n; i++) {
    a[i] = 0;    // Initialize all elements to zero.
}
. . .  // Use a as a normal array
delete [] a;  // When done, free memory pointed to by a.
a = NULL;     // Clear a to prevent using invalid memory reference.

Source: fredosaurus.com

Similar codes

0 vote345 views1 answer
C++ windows error message
C++
0 vote313 views1 answer
3 conditions for a while loop c++
C++
0 vote336 views1 answer
How can I replace a pattern from string in c++
C++
1 vote322 views1 answer
String c++ if letter or number
C++
0 vote325 views1 answer
Extra parameter in comparator function for sort
C++
0 vote329 views1 answer
Mid of linked list
C++
1 vote312 views1 answer
Whole size of the internet
C++
0 vote348 views1 answer
Operand-- c++
C++
0 vote345 views1 answer
C++ iterate over vector of pointers
C++
0 vote345 views1 answer
Tree to array c++
C++