/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

1 vote221 views2 answers
Maximum value in map in c++
C++
0 vote267 views1 answer
C++ basic snippet
C++
29 votes286 views6 answers
Convert string to number c++
C++
0 vote216 views1 answer
Convert all strings in vector to lowercase or uppercase c++
C++
4 votes213 views2 answers
Max value of double c++
C++
0 vote231 views1 answer
Inner Section Sticky Scroll in elementor
C++
-5 votes221 views1 answer
Convert char or string to int or double
C++
0 vote216 views1 answer
Border radius layout android xml
C++
0 vote243 views1 answer
Tic toc toe c++
C++
0 vote202 views1 answer
Namespace c++
C++