/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 vote171 views1 answer
Program to check smallest num in three numbers in c++
C++
0 vote229 views1 answer
Print value of data in c++
C++
0 vote186 views1 answer
What is push() c++
C++
0 vote155 views1 answer
Reference variablesr in c++
C++
2 votes209 views1 answer
Cannot find "-lsqlite3" C++
C++
1 vote177 views1 answer
Print std map
C++
2 votes177 views2 answers
Check if directory exists cpp
C++
1 vote230 views1 answer
Xmake set binary name
C++
1 vote256 views1 answer
Multithreading
C++
0 vote132 views1 answer
Case 1 or 2 c++
C++